Because they take a lot of value out of a shared society and concentrate too much power on their hands.
> What are you going to get out of it?
Reduce the power discrepancies, mostly, and money too.
> Do you think taxing the billionaires is actually going to help the poor people?
Yep.
You are asking about government efficiency, but one of the reasons for the lack of efficiency is that billionaires do not want it.
[1] https://www.sfchronicle.com/politics/article/S-F-officials-w...
A side effect of a wealth tax is that instead of wealthy people building wealth that's just going to be taxed away, it would incentivize funding charitable foundations like the Gates Foundation. Bill Gates has done a lot of good with his foundation, but that doesn't meant that one person should control that much money.
They are really not better than government because these people are the one who lobbies government to vest their selfish desires.
You should check out the shenanigans that the US government gets away with. Whatever bad things Musk, Gates and crew is small fry compared to the government.
"USPS's operating revenue was $77 billion for the 2021 budget year, an increase of $3.9 billion, or 5.3%. It reported a 2020 net loss of $9.2 billion."
https://www.reuters.com/business/us-postal-service-reports-4....
Metric 1: They provide an efficient service. Posts reach on time (rain or shine), they have systems and process that make the organization not waste effort.
Metric 2: They earn more money that what is spent by them.
By metric 1, postal service, railways and public transport in most places, a large part of governmental services (DMV), medicare in US are efficient. Depending on your neighborhood, even police, fire and ambulance are efficient.
by metric 2, most government services will not be efficient.. however, the government is not a business and I would argue that because people confuse 2 with 1 is why US does not have a better quality of life. The job of government is service using tax dollars.
Take public transport for example. In my mind, it should be mostly subsidized and effectively free. Trying to make it a profit center makes it a "non-public" transport and you end up with limited services which has secondary effect of reducing mobility and restraining the economy.
I can send a letter anywhere in t he country for 58 cents, UPS or Fedex would charge $10?
The military also “runs at a loss”—should we expect it to be profitable?
https://taxdude.substack.com/p/should-we-actually-wealthtax-...
Now if your goal is just to spite them for the illusion of justice, there are other ways of doing that.
(Spot the outlier on the first graph: https://ourworldindata.org/the-link-between-life-expectancy-... )
Why does everyone want to tax the billionaires? What are you going to get out of it? Do you think taxing the billionaires is actually going to help the poor people?
If so, riddle me this: Name one efficiently-run government organization.