> "In practice what you're doing is disallowing employers from offering employees terms of employment that provide the employee with working conditions of greater non-monetary value than ordinary jobs in exchange for less money."

the other side of that problem is that the wages are dictated by one party (with basically no external price signals impinging on them) rather than being free to respond to demand. it has the same anti-competitive issues that any price-fixing scheme has. plus, there are other sociopolitical forces depressing wages in a decidedly tilted labor market. fix those imbalances and then we'd have much more support for a freely self-adjusting labor market for driving.