It would also encourage CEOs to replace low-paid workers with expensive to maintain, buggy robots - sure, the company/shareholders might be somewhat worse off,

It would also encourage CEOs to replace low-paid workers with expensive to maintain, buggy robots - sure, the company/shareholders might be somewhat worse off, but the CEOs wage could go up, and you can always misrepresent the costs and benefits, especially if there's an industry-wide trend in that direction. Or you could make contractors out of employees.