Give some examples. There's no doubt that tax policy is used to carry out government policy, usually never without some controversy. Take for example real estate taxes. They are paid to local governments, usually the county. But they are deductible from your federal income tax (that is, they reduce your taxable income). Presumably it is to encourage home ownership, after a fashion. But you could call it a tax loophole, too.
However, I think you'll get an argument is you think you can tax something out of existance. You can't even make think disappear by making them illegal altogether. Basically, I don't think social engineering works nor are that many people interested in it.
I'm more worried about privitization.
Shoot low, sheriff. They're riding Shetlands!
Underneath the starry flag, civilize 'em with a Krag,
and return us to our own beloved homes!
Buy War Bonds.