luxury taxes (taxes on luxuries)

"[Luxury taxes] have some properties which strongly recommend them. In the first place, they can never [...] touch those whose whole income is expended on necessaries; while they do reach those by whom what is required for necessaries, is expended on indulgences. In the next place, they operate in some cases as [...] the only useful kind of sumptuary law. I disclaim all asceticism, and by no means wish to see discouraged, either by law or opinion, any indulgence (consistent with the means and obligations of the person using it) which is sought from a genuine inclination for, and enjoyment of, the thing itself; but a great portion of the expenses of the higher and middle classes in most countries [is incurred] from regard to opinion, and an idea that certain expenses are expected from them, as an appendage of station; and I cannot but think that expenditure of this sort is a most desirable subject of taxation. If taxation discourages it, some good is done, and if not, no harm; for in so far as taxes are levied on things which are desired and possessed from motives of this description, nobody is the worse for them. When a thing is bought not for its use but for its costliness, cheapness is no recommendation. As Sismondi remarks, the consequence of cheapening articles of vanity, is not that less is expended on such things, but that the buyers substitute for the cheapened article some other which is more costly, or a more elaborate quality of the same thing; and as the inferior quality answered the purpose of vanity equally well when it was equally expensive, a tax on the article is really paid by nobody: it is a creation of public revenue by which nobody loses."

-- John Stuart Mill