Much of the current "labor complaints" in general come from the maximization that doesn't "exist on paper" - jobs often involved "downtime" (even if you have slogans like "if you can lean, you can clean") and a few hours each day of absolute panic crunch-time.

Now we're becoming quite capable of optimizing it so that the panic crunch-time is the entire shift (and if it isn't you make less than minimum wage) via these "Silicon Valley gig apps".