Really? At least with taxes your money is likely to stay local (whether you agree with how it is spent or not), whereas with a multinational corp like Apple, Tesla or Google your money is just as likely to go somewhere outside the country.
You might dislike some of the details but aren't those things there to stop people dying, starving or living in misery?
Doesn't the entire developed world have programmes similar to those you've just dismissed as 'mundane and transient' - presumably to stop the masses rioting in the street?
Which libertarian paradise should we be looking to for guidance here?
Ubiquitous AI and clean, cheap energy would be more effective in accomplishing the same thing. Not to mention off-world colonies would stop the human race as a whole from dying.
Ensuring you and I and Grandma enjoy a little more comfort and security throughout our measly lifespans doesn't seem as inspiring and deserving of, what, $2 trillion a year?