Both income and point of sale taxes definitely feed into inflation so I'm not certain why you're trying to draw a distinction between those taxes on productive money and taxes on accumulated wealth (generally unproductive money).
Those are deflationary. They reduce transactions (because you want to spend less) and they reduce the money supply. Wealth taxes reduce the money supply as well, but they increase transactions because you have to buy the currency to pay them in by selling your assets.
That's because you still have to pay wealth taxes in currency, not just by giving up your "wealth". You can't pay taxes in 1/4 of a house or painting.
Although I'm pretty sure an 80% wealth tax would just collapse the economy because people wouldn't own their homes or businesses anymore. Maybe you could take 80% of their debt too?
