Its an impossible answer. I don't think it is a viable strategy either.
I don't think you are right about how much wealth the rich hold. The middle class would not need to be taxed. The illegitimate ruling class should just have the bulk of their wealth confiscated (at least according to the proposal I am trying to air here). The billionaires would still live well, but the rest of would have a chance to utilise all the assets that are currently being sequestrated away from us.
We see articles such as, 'World's 26 richest people own as much as poorest 50%, says Oxfam':
https://www.theguardian.com/business/2019/jan/21/world-26-ri...
I think this is a joke - we don't even know who holds what as it is all in off-shore, tax free funds and trusts, shares, etc. So the true amounts of wealth are bound to be far higher. Also, if it were possible to resolve the ownership structure, you would see that everything is owned by individuals - only living people own things. People direct the trusts, own the funds, corporations etc.
What I'm trying to get across is the fact that if we were genuinely seeking solutions, releasing this stockpiled wealth would be the simplest. It would be at least deserving of some consideration. And I'm not talking about releasing it into an NGO that directs how culture is to be created.
But we have the opposite - we are moving into a complex, AI managed world, where the poor are going to be paying carbon taxes, water taxes, have more expensive electricity and be unable to ever consider owning anything for themselves. This won't mean that ownership as a concept will have gone - it will mean the billionaire class will own everything, and the rest of us will be demoted to serfs, aka overt slavery.
But as I said I don't think this is viable answer either.
And I'm not sure what the right answer could be. For a start governments are a problem - they do not act for people, they are beholden to corporate interests. The legal system is also a problem - it only works for the rich - how can it be ok for the richest to pay no tax? Let's all not pay tax! Let's pay for the services we want. But, government has become a comfort blanket for most - most people are happy to pay 40% of their income to have their bins collected.