The more wealth you have, the more you need taxation.
People with lots of stuff get more benefit from socialised property protection services, like the police and the fire department, than those with very little.
I expanded on it here.
Threatening people with violence is uneconomical unless
- The people you're threatening believe you have a right to do so.
- The cost of hiring people to do the threatening is externalised onto others.
TLDR; wealthy people already have hired thugs to protect their mansions, and to rob the poor to pay for it.
Less of that would be good.