Dude.,. If you've studied economics then you know that by the Second Welfare Theorem, it is possible to redistribute endowments to achieve alternative pareto optimal distributions... Ie... a tiny few super-elite ultra wealthy with millions or billions in poverty subservient to them is only one possible free market allocation.
You don't have to give up capitalism, free market, or assume the end of scarcity or any other such nonsense... just standard economics... though implementing this is difficult precisely because it goes against the interests of the wealthy.
Money is SIMPLY a tool to indicate the balance between demand and supply... and we don't need to finish with money either.
Wealth Tax and Basic Income should be implemented to redistribute the efficiency gains that have been achieved over the last few decades, but that have only been benefited the wealthiest members of society, and not all of us.
I think you'd agree that a Wealth Tax and Basic Income are about as close as practical implementation of Lump Sum Transfers required by the Second Welfare Theorem... That it maintains the value of money, free market and capitalism in general... and redistributes the benefits of productivity increases to all, not just a handful...