But when PostNL wants to fire all their mail deliverers and rehire them as independent contractors, they can. When I asked why, it turned out the main difference was that they are replaceable and I'm not: if they're unable to deliver mail at a certain day, they can get a friend to do it for them. When I'm ill, I can't send someone else to do my job.
It's a stupid rule. It's the exact reason why I have power over my work situation and they don't, yet somehow it's the reason why their situation is allowed and I constantly need to prove myself (though I haven't had any trouble so far).
And maybe it should be hourly rate rather than yearly revenue, because a client might have no idea what a contractor's year looks like. You don't want clients to be forced into additional commitments until they've hired you for enough hours.
Finally, where I live at least, the "Scheinselbständigkeit" regulation would not necessarily apply to to Uber/Lyft even if it existed here: many of the ride-share cars I see around here have both Lyft and Uber signage and the drivers will switch their time between the companies. I don't know all the dynamics of why drivers do that, but I'm sure there are reasons for doing that.