Wouldn't a land value tax hit the older poorer seniors the hardest? Those without an income and by not fault of their own they are forced to sell because the value of their house raised?

Taxing capital gains on principle residences means people are less likely to move up to a better home which creates a problem for first time home owners trying to enter the market as no supply exists.

Wealth tax requires you to know everyone's wealth. How are you going to get that information / verify on a yearly basis.

Treat loans using securities as collateral as a capital gain or income, and tax it as such.