It can really depend. For example in the UK there is the Working Time Directive which limits employers to a 48 hour maximum working week. Except the employee ca

It can really depend. For example in the UK there is the Working Time Directive which limits employers to a 48 hour maximum working week. Except the employee can opt out of it voluntarily and the power relationship means this is almost never actually voluntary. No doubt some places have strong laws but many have so much wiggle room the laws on the books look nothing like reality.