Hamilton's preference was for the first of these courses, as the one that admitted of the application of those principles of government which he was endeavoring to introduce into the federal system; for he saw that in the theory of the Confederation there was an inherent inequality, which would constantly increase in practice, and which must either be removed, or destroy the Union. He maintained, that, where there are considerable differences in the relative wealth of different communities, the proportion of those differences can never be ascertained by any common measure; that the actual wealth of a country, or its ability to pay taxes, depends on an endless variety of circumstances, physical and moral, and cannot be measured by any one general representative, as _land_, or _numbers_; and therefore that the assumption of such a general representative, by whatever mode its local value might be ascertained, would work inevitable inequality. In his view, the only possible way of making the States contribute to the general treasury in an equal proportion to their means, was by general taxes imposed under continental authority; and it is a striking proof of the comprehensive sagacity with which he looked forward, that, while he admitted that this mode would, for a time, produce material inequalities, he foresaw that balancing of interests which would arise in a continental legislation, and would relieve the hardships of one tax in a particular State by the lighter pressure of another bearing with proportional weight in some other part of the Confederacy.[194] Accordingly, after an attempt to postpone the consideration of a mode of carrying out the Confederation, he made an effort to have its principle changed, by substituting specific taxes on land and houses, to be collected and appropriated, as well as the duties, under the authority of the United States, by officers to be nominated by Congress, and approved by the State in which they were to exercise their functions, but accountable to and removable by Congress.[195] These ideas, however, as he himself saw, were not agreeable to the spirit of the times, and his plan was rejected. After many fruitless projects had been suggested and discussed, for making the valuation required by the Confederation,--some of them proposing that it should be done by commissioners appointed by the United States, and some by commissioners appointed by the States,--it was determined to propose no other change in the principle of making requisitions on the States, than to substitute population in the place of land, as the rule of proportion.[196]