I think zero inheritance is probably not gonna work. You'll just incentivize a black market (think jewels, cash in mattresses, gold, whatever...people will get

I think zero inheritance is probably not gonna work. You'll just incentivize a black market (think jewels, cash in mattresses, gold, whatever...people will get creative). You want to find the level where the benefits outweigh the costs. That's probably some significant amount of inheritance, but also a very hefty tax. I don't know where exactly it is, and it'll probably vary with a lot of factors.