2 observed distinctions between the government and million / billionaires for those that want to tax them.
Government programs are grossly inefficient, and some even measure success by how much of your tax money they spend. With the billionaire every dollar better be pulling its weight or it gets reassigned. “The best part is no part”.
The government is on a reelection cycle, two years into a project a different president or congress a decide to mess with the funding and kill the program. The billionaire isn’t (necessarily) ruled by whims, if the project is making progress they can ignore idiots and naysayers.
I recall watching one of the early starship launches, both booster and rocket got to the upper atmosphere and blew up. The media were hyperventilating “omg it blew up!” While SpaceX was celebrating - I successfully cleared the pad.
The next time you consider taxing people, do that while waiting in line at the DMV.