“Inflationary monetary policy” is wealth transfer to the government (which they're then supposed to spend on common infrastructure, and other collaborative projects that everybody agrees on but nobody wants to shell out for unless everyone else is too). If the government is supporting the upper class and leaving everyone else to rot, no monetary policy will fix the issue.
I think this is supposed to be true, but nowadays when the wealthy mostly hold assets that have real value, like real estate and equities, as opposed to USD in a bank account, I'm not sure how well it works.
Sadly, my internet degree in armchair economics doesn't give me the ability to come up with a functioning tax system (however much I think I can beat the status quo) so I have no further pearls of wisdom.