Capital controls aren't going to help the unemployed, the homeless, the working poor, the huge percentage of people who constantly live one paycheck or one medical issue away from bankruptcy. Capital controls will make those problems worse; forcing people to make bad decisions with their investments is not the fast track to getting great long term results.
There are capital controls and then there are capital controls - but preventing you from moving all of your money out of the country to avoid taxes is still a control on capital.
You mean the theory of...mathematics? More money in one place necessarily means less money in another.
If I sell a product for 100€ but only pay my worker 20€ to make it, I'm becoming rich. If my worker wants to buy that product, it costs them 5x their salary, but only costs me 1.4x. If all my CEO friends do the same for their products, the workers are becoming poor because of us becoming rich.
Now let's stop trying to be rich. Let's lower the margins and sell the product for 40€. Now it's 2x my salary (marginally worse for me), but also only 2x my worker's salary (much better for them). Let's say all of us CEOs do that. By not being rich, we've allowed our workers to be less poor.
The US and 'west' is already financially liberal, so we can make an observation: it is NOT good for everyone. Capital flows freely, but it flows upwards. Trickle-down economics is proven false. Advocating for more liberal finances also means being okay with leaving people behind and in the shit; the unemployed, the homeless, the working poor, the huge percentage of people who constantly live one paycheck or one medical issue away from bankruptcy, the people who work 16 hours a day at multiple jobs and still can't make ends meet, etc etc etc.
I mean to rephrase your claim, yeah capital / money should flow freely, but egalitarian. The wealth of an individual should benefit all. The richest countries in the world shouldn't have poverty on an individual level. There shouldn't be a case where a handful of people have more money than half the world population.
And I get it, building a space company and launching yourself into space is cool, but that money could also have gone to your employees to lift them out of poverty and insecurity.