The War on Drugs does provide a substantial benefit -- for the police forces who can buy shiny new toys by auctioning off stuff seized via asset forfeiture; the owners of private prisons; drug kingpins who earn their filthy lucre from peddling illicit wares; the members of public-sector prison-guard unions; and the laboratories who get to charge outrageous amounts of money to administer and process drug tests.
The general public, of course, does not share in this bounty and furthermore suffers from higher rates of violent crime spawned by prohibition.
It throws the burden of taxation more on the wealthy, because they buy more things, and they be the least harmed, because they are wealthy.
Erm, no . If Bill Gates is a million times wealthier than me, do you think he buys a million times more automobiles? He does consume more than I do, but nowhere near in proportion to his greater overall wealth. You're committing a fallacy of composition. The wealthy may consume 10 or 100 times more, but the bulk of the difference in income and wealth are locked up in bonds and offshore accounts. This stuff gets passed onto their progeny, creating a de facto dynastic ruling class.