Flaunting your wealth attracts supporters in this day and age. People *like* rich assholes. Its fashionable, or at least it was in the 2010s. The pendulum of society is finally swinging back and demonizing this outrageous display of wealth but we're still in an age where people literally worship wealth. Not the "figuratively literally", I mean literally literally worship as per the prosperity gospel (https://en.wikipedia.org/wiki/Prosperity_theology).
Its not just Elon Musk, but also Arkk's Cathie Wood and Bill Hwang.
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The outrageous displays of wealth is proof that you've achieved God's good graces. Its basically Mandate of Heaven (Chinese concept) except the American version of it.
Once you make $999,999,999.99 dollars, congratulations you have won at life!
All future income you make beyond $1B goes to helping society.
You should probably get a say into where the money goes (so it aligns with your values, whatever those may be) but that's it. You are done enriching yourself personally.
I kind of like that (although I'm sure plenty of people hate it).
The play money is so many orders of magnitude beyond what's used to keep society creaking along, that it's positively silly. The tiniest of wealth tax percentages can amount to whole social services budgets. These social services stop people with pitchforks from going after the billionaires and each other.
The problem in Norway's case is that the a lot of the richest people just moved to Switzerland or wherever...
Rabid liberalism is expensive.