Owning the means of production is rent seeking behavior. No way around that. Yes, freedom to enter into a contract is ethical but you will see throughout history, proof of work tends to show who’s NOT working when revolts happened. Historically, by the time the revolt happens the capital has the means to quell any opposition. Plenty of examples of that. That is why it’s an ideology change. If people are on the fringes of starvation…they will typically accept any “contract” to at least eat. That’s not ethical or moral.