Amongst all the causes of decline, one alone is found that has a double effect, and counteracts in one direction what it promotes in another. This is taxation, a very certain cause of ruin if carried too far, and always dangerous; but, for a length of time, having a very powerful effect in repressing the progress of luxury, in continuing the action of necessity, the mother of industry, and in preventing that species of consumption that lays the foundation for the depopulation of a country. From this it would seem to be almost as dangerous to take off the burthens that have been laid upon a people, as to lay them on with too heavy a hand. There is not any example worth noticing of such a case, therefore, it must stand on its own ground: history informs us nothing on the subject. The supposed case would be thus. That a nation should rise to a high pitch of wealth by industry, and support a heavy load of taxes, still increasing in wealth, and superior to most other nations. We are to suppose the load of taxes greatly diminished, and then to investigate the consequences. Perhaps this is an useless hyyothesis =sic=, the case never has been, and perhaps never will be; but, still it is, at least, a possible case; it is a matter of curiosity, at least, if it is not one of utility, and I have a great example to plead as my apology. Dr. Adam Smith amused himself in his inquiry into the causes of the wealth of nations =sic= in a similar manner, by a hypothesis concerning the taxation of the British colonies. Supposing the pressure of necessity were to be suddenly taken away, those whose income is regulated by their efforts would relax in exertion; that is to say, the productive labourers of the country would relax, while those whose incomes are fixed, that is principally [end of page #167] the unproductive labourers, would become comparatively more opulent, and their luxury would increase. This is an effect very different from what the public expects. The most useful class would gain little or nothing, while the drones of society would find their wealth greatly augmented, which would be one of the most unfortunate effects that could well be conceived, and might very soon bring about a very serious and disagreeable event. In the course of investigating the national debt of England, in the Fourth Book =sic--there is none.=, it will be necessary to examine this at length, but, there it will be attended with another circumstance, not one of general consideration; (as national debt is not any general or necessary appendage to a government) namely, the letting loose a great monied capital, which must either be employed here, or it will seek employment in another country, which may rise on the ruin of this.