- Tax capital gains and dividends that are classically the rates actually paid by the megarich rather than income tax.

- Tax wealth directly rather than just income.

- Tax much more heavily generally and commit to a significant basic income to ensure everyone has a solid baseline.

This is just off the top of my head, we have an entire government of people and a huge field of existing research and ideas, not to mention other countries and historic data on taxing more than the UK right now to look at.