Then I'd rather break the law than put my aircraft in danger
In an emergency I would do too.
But from what has been written, that isn't the case here. It appears to be pre-planned and carried out on a not uncommon basis.
It's unprofessional to be ignorant of the laws of any country over which we fly, or choose to ignore the ones we don't like, especially if safety may be compromised.
By that I mean the safety of others. The 250 kt rule is one of those rules and needs to be complied with irrespective of how heavy the commercial burden to the company to disregard it.