Ideally, it's less "redistribute billionaires' wealth" so much as "figure out what parts of the system allow some people to accumulate money orders of magnitude more than the effort they've put in, and tune them to allow anyone who works to afford a comfortable life".

As it is, money makes money, while effort alone makes barely enough to scrape by (or not even that much). There are many, many paths to fix it, and they don't need to simply move the money around. There are assumptions that deserve more consideration, and they can lead to better results.