Wage labour is righteous

Easy answer: Aggression is false
The false idea marxists have is that workers do not get paid their 'fair share' under capitalism because profits go to the capitalist.

This is a straight up entitlement claim on someone else's property with no basis.

Once again, it's all about abolishing Private Property which is aggression towards an individual which we know to be false through The Non-aggression Principle that is backed by Argumentation Ethics and further underpinned by the Primacy of Existence