Under the PST system of taxation:
1. The rich would pay for defence and foreign policy.
By maintaining their own estates and armies.
2. The middle classes would pay for the police.
By having private security guards for their homes.
3. The working classes would pay for social security.
It's called "farming".
Education would be paid for by private fees and charitable endowments.
But who would need it, given the system as above?