The problem with that is that although there are a few really extradinarily wealthy folks, taking even 100% of their wealth wouldn't sustain gov't spending for more than a few weeks. The tax base is mostly middle to upper-middle class taxpayers.
My point is, when people talk about taxing the rich, they are talking about most of the folks on HN (at least in SF). The top 1% households make ~$450k per year. That a couple who each take home $225k.
I remember an election in Canada a while back where the NDP (far left) said "We would increase the taxes on thr rich". Someone asked "who are the rich?" And they said "A family of four making more than $80K." I had to give them credit for being honest.
Even at $80k, you're doing nearly 3 times as well as the median American household.