Umm... nothing and that's the point. It's free market capitalism. People should be free to do whatever they want with their time.
So long as the value they provide is greater than their cost, the deal is good for both parties
Ideally people would only work 30 hours but get paid for the full week.
Hourly billing is bullshit anyway. The natural cadence of work doesn't map to always being able to extract value from every single hour. Sometimes the value is in being more or less available for that week.
It's astonishing how many developers can't grasp that concept and insist on being super strict about hourly work
History says otherwise, unless you mean people should be free to abuse of others lack of judgement when their survival is on the line. That's why they started to cap working hours and protecting children from being part of the workforce. Also, you don't have to go that far into history. Some uber drivers I've talked to want to get out of that business but can't because they were bamboozled into signing a car loan they can't pay without working for Uber and they mention that when they signed it they had an expectation of earnings that has been steadily going down.
No comment on your assumption that I'm a developer unless you meant it as a standalone fact.
So long as the value they provide is greater than their cost, the deal is good for both parties
Ideally people would only work 30 hours but get paid for the full week.
Hourly billing is bullshit anyway. The natural cadence of work doesn't map to always being able to extract value from every single hour. Sometimes the value is in being more or less available for that week.
It's astonishing how many developers can't grasp that concept and insist on being super strict about hourly work