Fine, lose (1 - 0.75^4) = 68% of everything. Plus what is lost to inflation. Thank you for such meaningful criticism.
Your comment suggesting that losing 68% after 100 years is similar to keeping 0% is very strange to me, those don't seem similar at all. And then the 68% doesn't even account for growth, which has always been greater than inflation in the past.
Generally the idea that people 100 years from now should be able to live off the labor their ancestors did 100+ years ago seems absurd to me. Those people did nothing to deserve that wealth.
OK, how about this: I pay zero taxes in my lifetime, and then government can take 25% of the estate after I die. What do you think of that?
In the end the government has to be funded somehow, the only question is how? Taking money from those who did not earn it seems the best option to me.