According to the newspaper, the companies can claim that they were misled by the laws and made their decisions to invest here solely on these laws. So they can also try to claim future costs which are caused by being based in Belgium. I'm not a lawyer so I don't know if you're right.

While I would deplore having to hand over more government money to these multinationals (especially since I am a small business owner in Belgium myself), I still believe that the rule of law is more important. These deals shouldn't have existed in the first place, but I think the erosion of trust if they are retracted without compensation is also a grave cost...