money is fake^Wfiat. it's just points in the game of capitalism. we have designed money so we can most importantly pay taxes with it, but also buy food and shelter and receive it for something or indeed anything, but we can also design a slightly different system where we receive it for no reason at all.
Even taxing the richest households and extra 5% would only give the poorest households an approximate extra $1000 per year. This isn't life changing and isn't even much of a supplement. This is a very non trivial problem to solve. We need a much larger source of money.