Here's Smith on the topic of what Europe contributed to its American colonies (with footnotes omitted for readability):
"The policy of Europe, therefore, has very little to boast of, either in the original establishment or, so far as concerns their internal government, in the subsequent prosperity of the colonies of America. Folly and injustice seem to have been the principles which presided over and directed the first project of establishing those colonies; the folly of hunting after gold and silver mines, and the injustice of coveting the possession of a country whose harmless natives, far from having ever injured the people of Europe, had received the first adventurers with every mark of kindness and hospitality...."The English Puritans, restrained at home, fled for freedom to America, and established there the four governments of New England. The English Catholics, treated with much greater injustice, established that of Maryland; the Quakers, that of Pennsylvania. The Portugueze Jews, persecuted by the Inquisition, stripped of their fortunes, and banished to Brazil, introduced by their example some sort of order and industry among the transported felons and strumpets by whom that colony was originally peopled, and taught them the culture of the sugar-cane. Upon all these different occasions it was not the wisdom and policy, but the disorder and injustice of the European governments which peopled and cultivated America. ...""When those establishments were effectuated, and had become so considerable as to attract the attention of the mother country, the first regulations which she made with regard to them had always in view to secure to herself the monopoly of their commerce; to confine their market, and to enlarge her own at their expence, and, consequently, rather to damp and discourage than to quicken and forward the course of their prosperity. In the different ways in which this monopoly has been exercised consists one of the most essential differences in the policy of the different European nations with regard to their colonies. The best of them all, that of England, is only somewhat less illiberal and oppressive than that of any of the rest."
"In what way, therefore, has the policy of Europe contributed either to the first establishment, or to the present grandeur of the colonies of America? In one way, and in one way only, it has contributed a good deal. ... It bred and formed the men who were capable of achieving such great actions, and of laying the foundation of so great an empire; and there is no other quarter of the world of which the policy is capable of forming, or has ever actually and in fact formed such men. The colonies owe to the policy of Europe the education and great views of their active and enterprising founders; and some of the greatest and most important of them, so far as concerns their internal government, owe to it scarce anything else."
Smith's discussion of how Europe has benefited from its American colonies turns on three main themes. First, he emphasizes (as one might expect) how Europe can benefit both as a consumer of imported goods from the colonies and a producer of exported goods to its colonies. Second, he points out that the colonies do not pay for their own defense, let alone add to the strength of their European colonizers, and so the cost to the European nation of maintaining order in peacetime and then fighting the wars of the colonies must be taken into account. Third, he emphasizes that colonizing countries each sought to monopolize commerce with their colonies. A a result, those who hold the monopoly over transporting such goods profit, but the overall economic gains from trade are reduced, and a number of other dislocations and inefficiencies arise. In effect, the country of England pays the costs of the colonies in order to benefit the merchants who hold the monopoly on trade, even as the flow of resources to that monopoly weakens other aspects of England's economy. In Smiths phrase, the purpose of the empire became "raising up a people of customers" for certain favored English "shopkeepers." Smith wrote:
"To found a great empire for the sole purpose of raising up a people of customers may at first sight appear a project fit only for a nation of shopkeepers. It is, however, a project altogether unfit for a nation of shopkeepers; but extremely fit for a nation whose government is influenced by shopkeepers. Such statesmen, and such statesmen only, are capable of fancying that they will find some advantage in employing the blood and treasure of their fellow-citizens to found and maintain such an empire. Say to a shopkeeper, Buy me a good estate, and I shall always buy my clothes at your shop, even though I should pay somewhat dearer than what I can have them for at other shops; and you will not find him very forward to embrace your proposal. But should any other person buy you such an estate, the shopkeeper would be much obliged to your benefactor if he would enjoin you to buy all your clothes at his shop. England purchased for some of her subjects, who found themselves uneasy at home, a great estate in a distant country. The price, indeed, was very small, and instead of thirty years purchase, the ordinary price of land in the present times, it amounted to little more than the expence of the different equipments which made the first discovery, reconnoitred the coast, and took a fictitious possession of the country. The land was good and of great extent, and the cultivators having plenty of good ground to work upon, and being for some time at liberty to sell their produce where they pleased, became in the course of little more than thirty or forty years (between 1620 and 1660) so numerous and thriving a people that the shopkeepers and other traders of England wished to secure to themselves the monopoly of their custom. Without pretending, therefore, that they had paid any part, either of the original purchase-money, or of the subsequent expence of improvement, they petitioned the parliament that the cultivators of America might for the future be confined to their shop; first, for buying all the goods which they wanted from Europe; and, secondly, for selling all such parts of their own produce as those traders might find it convenient to buy. ... A clause in the famous act of navigation established this truly shopkeeper proposal into a law."
"In order, however, to obtain this relative advantage in the colony trade, in order to execute the invidious and malignant project of excluding as much as possible other nations from any share in it, England, there are very probable reasons for believing, has not only sacrificed a part of the absolute advantage which she, as well as every other nation, might have derived from that trade, but has subjected herself both to an absolute and to a relative disadvantage in almost every other branch of trade. ... "
Smith discussed various possibilities for how Great Britain might deal with its colonies. One proposal was that Great Britain should just "voluntarily give up all authority over her colonies," which would then allow Britain and America, in friendship to benefit from free trade between them. But he despaired of this possibility.
"To propose that Great Britain should voluntarily give up all authority over her colonies, and leave them to elect their own magistrates, to enact their own laws, and to make peace and war as they might think proper, would be to propose such a measure as never was, and never will be adopted, by any nation in the world. No nation ever voluntarily gave up the dominion of any province, how troublesome soever it might be to govern it, and how small soever the revenue which it afforded might be in proportion to the expence which it occasioned. Such sacrifices, though they might frequently be agreeable to the interest, are always mortifying to the pride of every nation, and what is perhaps of still greater consequence, they are always contrary to the private interest of the governing part of it, who would thereby be deprived of the disposal of many places of trust and profit, of many opportunities of acquiring wealth and distinction, which the possession of the most turbulent, and, to the great body of the people, the most unprofitable province seldom fails to afford. The most visionary enthusiast would scarce be capable of proposing such a measure with any serious hopes at least of its ever being adopted. If it was adopted, however, Great Britain would not only be immediately freed from the whole annual expence of the peace establishment of the colonies, but might settle with them such a treaty of commerce as would effectually secure to her a free trade, more advantageous to the great body of the people, though less so to the merchants, than the monopoly which she at present enjoys. By thus parting good friends, the natural affection of the colonies to the mother country which, perhaps, our late dissensions have well nigh extinguished, would quickly revive. It might dispose them not only to respect, for whole centuries together, that treaty of commerce which they had concluded with us at parting, but to favour us in war as well as in trade, and, instead of turbulent and factious subjects, to become our most faithful, affectionate, and generous allies ..."
As an alternative, Smith suggested that there could be taxation with representation: that is, Americans could be given representation in the British parliament. He argues that if Americans were offered such a possibility, many of their leaders would be delighted with the chance to rise in British politics. But denied such a possibility, the American leaders feel a
"The parliament of Great Britain insists upon taxing the colonies; and they refuse to be taxed by a Parliament in which they are not represented. If to each colony, which should detach itself from the general confederacy, Great Britain should allow such a number of representatives as suited the proportion of what is contributed to the public revenue of the empire, in consequence of its being subjected to the same taxes, and in compensation admitted to the same freedom of trade with its fellow-subjects at home; the number of its representatives to be augmented as the proportion of its contribution might afterwards augment; a new method of acquiring importance, a new and more dazzling object of ambition would be presented to the leading men of each colony. Instead of piddling for the little prizes which are to be found in what may be called the paltry raffle of colony faction; they might then hope, from the presumption which men naturally have in their own ability and good fortune, to draw some of the great prizes which sometimes come from the wheel of the great state lottery of British polities.And of course, Smith's prediction, published in 1776 but largely written several years earlier, came true. To repeat, on this Fourth of July: "From shopkeepers, tradesmen, and attornies, they are become statesmen and legislators, and are employed in contriving a new form of government for an extensive empire, which, they flatter themselves, will become, and which, indeed, seems very likely to become, one of the greatest and most formidable that ever was in the world."
"Unless this or some other method is fallen upon, and there seems to be none more obvious than this, of preserving the importance and of gratifying the ambition of the leading men of America, it is not very probable that they will ever voluntarily submit to us; and we ought to consider that the blood which must be shed in forcing them to do so is, every drop of it, blood either of those who are, or of those whom we wish to have for our fellow-citizens. They are very weak who flatter themselves that, in the state to which things have come, our colonies will be easily conquered by force alone. The persons who now govern the resolutions of what they call their continental congress, feel in themselves at this moment a degree of importance which, perhaps, the greatest subjects in Europe scarce feel. From shopkeepers, tradesmen, and attornies, they are become statesmen and legislators, and are employed in contriving a new form of government for an extensive empire, which, they flatter themselves, will become, and which, indeed, seems very likely to become, one of the greatest and most formidable that ever was in the world. ... Almost every individual of the governing party in America fills, at present in his own fancy, a station superior, not only to what he had ever filled before, but to what he had ever expected to fill; and unless some new object of ambition is presented either to him or to his leaders, if he has the ordinary spirit of a man, he will die in defence of that station."
