Christian obligation cannot be made to accord with a law of expediency. The Christian's maxims are, Do right because you are bound to do right. Do right though the heavens fall. There is a world of difference between You had better and You are bound to.
It is a general maxim that all governments find a use for as much money as they can raise. Indeed, they have commonly demands for more. . . I take this as a settled truth, that they will all spend as much as their revenue; that is, will live up to their income.