Would this be legal in any jurisdiction (click-or-be-fired)? I am not familiar with US labour laws, are employees actually at the level of indentured servants considering terms of employment (which I would expect to be a contract between TWO parties)?
In the US, in most (all?) jurisdictions, your employer doesn't really need to have a reason to fire you. They can fire everyone wearing red shirts, if they wanted to. There are also very few places providing leave (outside of white-collar positions). For example, my wife was given two weeks off from her job after having my son. The state we lived in only required maternity leave to be implemented at companies having…
IIRC it's much safer not to provide any either — except in Montana which I believe requires Just Cause after probation, as there are only a handful of statutory exceptions to at-will employment, and most of them are very, very hard to prove without an extensive paper trail... or the employer spelling it out when they fire you.