Earlier quoted context omitted.
This only works if you are holder of passport of the origin country. As a third world country national, I cannot legally work anywhere except the country I got my work visa. PS: Even if company is multinational corporation.
Laws are still written for those doing manual labor. What's the difference if I do some work in the evening at home or during my holiday in e.g. Greece? The only added cost in given country is energy. Problems start to appear if I get sick, but that should be on myself - and in most cases (for EU citizen) it is most appropriate to return home to cure/hospitalize (unless it is something needing immediate help).
What with labor laws? Should you follow the laws from the country from where you work or where the company is located? Companies would just get a post box in the country with the weakest labour laws.
The simplest solution stays that the laws where you physically are apply.