If your business cannot survive paying more than slave labor rate, then a capitalist system dictates that your business should cease to exist or your resources allocated to more productive work.

Capitalism is what capitalists do. No capitalist system dictates that, because that no capitalist system practices that. Wages don't increase with productivity anymore, the gap between the two has only increased since the 1970s.

Capitalists come out of the woodwork to denounce things like the minimum wage or unions that distort the fair market value of labor because they want to pay as little as possible and not a cent more. Why do you think automation and outsourcing exist to begin with? Why are we putting Manhattan Project scale effort into AI? Wages are an inefficiency in the market that capitalism has always sought to ruthlessly optimize away.