Ignoring all that (and many more questions of the sort) I'm left with only one question: how exactly is Musk helping "the poor"?
The tax issue can be resolved by luxury taxes. If people decide they'd like $100 million yacht, tax them $200 million for it. Countries like Singapore already have punitive taxes like that on cars.
If you think it's such a travesty that the guy has money and enjoys it, then maybe you should go to all the people who consensually traded with him and tell them what bad people they are for buying his products and services.
That's one of the less efficient ways to solve most problems, even after discounting corruption.
And now for the things you haven't addressed. Why is the government the most efficient way to solve the problem? Why cancer or immortality or space exploration are more important than food or malaria or sex education? Just because you like them?
I think you should stop and think real deep about the questions I've stated and implied in this thread, and answer them in length, with references where appropriate. Then share them.
Else all you end up doing is coming across as a naive angry fanatic with not too much reading comprehension skill (remember all this started because you misinterpreted DHH's essay) who doesn't even get to see the problem and is boasting about solutions.