we see this happen in countries with poor security records. Rich people get high quality private security and then they care less about supporting the police. Similarly with water quality in many countries where rich/middle class people get water delivered. It is in the public interest to not allow the wealthy to internalize these externalities only for themselves so that they focus the government resources towards solving them for everyone.

>Rich people get high quality private security and then they care less about supporting the police.

Do you really think that "rich people" will disregard air pollution because their car provides filtered, clean air?

People will always assign priority to problems depending on how much of it they are personally experiencing.

(With the notable exception of Hollywood celebrities desperately searching for a purpose in life)

And schools, and... that list goes on and on.

Schools are particularly nasty because bad public schools make private schools more effective at giving an advantage in life.