Re: Conceptually not bad but ...
If some countries believe they can only take advantage of EU market while creating the very situation that will cause that market to not work, one day EU will change, a new smaller organization will take the place of the older one, and some countries will be kicked out. Rules can be always changed.
As the situation worsens what could have been barely acceptable before may no longer be. Small countries believing they could be tax havens to extract wealth from larger ones may find the game can work no longer.