[JamesBarney]

This is a Pigovian[0] tax so the tax by itself makes the world more efficient. Also since most governments can borrow lots of money, tax revenue is fairly decoupled from government spending.

And if people are concerned about an increase in tax revenue being spent on Social Security or Medicare they could just use the money to write everyone a lump sum tax refund.(or reduce the income tax etc...)

[0] https://en.wikipedia.org/wiki/Pigovian_tax