The big problem with a land tax is that you'd have billionaires paying little tax. One may reasonably counter that that's fine if they aren't actually consuming much and it's probably correct. The majority of society won't go for it though.
There aren’t many billionaires. Expropriating all their wealth wouldn’t move the needle for any of our budgetary problems.
I’m all for closing the step up in basis on death, which is what allows billionaires (and of course only moderately rich folks) to avoid paying much tax over their full life cycle.
But LVT is a good idea, regardless of whether billionaires get some extra punishment for having the temerity to create successful businesses.
I don't think so. Billionaires consume quite a lot of real-estate, even if indirectly through their business enterprises. Consider the Google campus in Mountain View or the Microsoft one in Redmond.