> If there is anything akin to "wage slavery" in modern times it is more because of income tax than anything else

Don't invent stuff to make an argument. Wage slavery is what happens in the 'free market'. The very invention of wage slavery was to make conditions of slavery happen after slavery was abolished so that former slaveowners wouldnt go bankrupt. It was implemented in post civil war US, then it was copied by Brazilian slaveowners when slavery was abolished in Brazil.