Or completely the reverse - all mandatory benefits as a percentage of wages. We kind of, sort of do that in Germany (up to about 50k for health insurance, 90k for retirement, I think)
Increased employee costs make an employer less likely to take risks and produce pressure to hire less workers. Then a few workers gain at the expense of others not having a job at all. Why do you hate workers?
Come to think of it, that's probably why I have so many colleagues on 20-32 Hr/wk contracts... Mostly, mothers of young children. But they're doing the same sort of technical work others on full time contracts are.
Yay, Germany!