1. I would like to see strong progressive taxation that explicitly taxes concentration of wealth. This would be aimed at all large companies and wealthy individuals, and ultimately based on which actual human persons have legal control of the company such that it can't be gamed by creating shell companies, etc.
2. On top of this, I don't see why we can't explicitly put tariffs on things like financial or advertising transactions. Somewhat similar to a Carbon Tax, it would correct for costs to society caused by the activity. I'd be particularly keen on seeing measures that make it extremely expensive to do short-term trading, forcing investors to take a much more long-term view.
As he's showing, it won't be easy. EVERYONE will try to kill the earnest attempts. For all of Musk's faults, he is trying to show there is another way and how to get there.
I mean, as many others have pointed out, Musk had to get rich first in the finance world before he could get enough F.U. money to indulge his real passions.
That's precisely the problem that I (and Musk it seems) are pointing out. These activities shouldn't have better reward profiles.
But so what? A lot of people believe that. What I have never heard is a realistic plan for restructuring the economy that makes things like finance and advertising less lucrative.
Technology naturally leads to a "winner take all (or most)" economic system. When it's so easy to switch to competitors, platforms that are even a tiny amount better than their competitors can take all the mindshare of an industry.
In that environment of extreme economic concentration, fields like finance and advertising (which is really controlling marketplaces) will always be extremely lucrative. Haven't heard any good proposals on how to change that.