Another thing to consider is that the law is heavly focused on full employment and there are lots of benefits. This is true in almost all countrys, laber market regulation have a clear focus on this.

We have no idea what the (abstract) free market laber time would be. For better or worse our economys have devloped into a kind of paradigm that is not focused on flexibilty. This has devloped in the industrialisation and should be more relaxed now. In some places (most places programmers work) working hourse are allready much more flexible.