“Companies have always had this and that power therefore it’s justified” is a poor argument and has absolutely no justification power for the present. Picture this, a bit further in the past, during feudalism, workers aka serfs were bound to the land owned by a lord. They were required to work the land, pay rents, and provide other services to their lord. Serfs needed permission to marry, could not leave the land without consent, and had to submit to the lord’s court for any legal disputes.

So why arbitrarily draw the line 20 years in the past and not 400 years? Only. Because something used to be in a certainty way gives us no guidance if it should be in such a way.