Tax is bad rent
Taxation is the money we pay in order to live under a particular government. So taxation is a form of rent. It proves that we are willing to pay a lot of rent!
But tax is bad rent, because:
2. Tax corrupts:
Taxation rewards bad government
but ground rent only rewards results.
There are a number of other differences, due to ground rent being simple, transparent and largely under your control. But in short, taxation is a corrupt mockery of ground rent, and the sooner it is replaced with honest rent, the better.