I just posted about this in another thread.
Yes that is a suggestion which has been put to the government, but as far as I am aware, nothing has yet been decided (or if it has, they aren't saying).
And yes, I could see all hell breaking loose if they did this, which to me would make me logically think they will hold back - at least for now - until the consequences could be predicted.
And yes, it's probably against a European law. Barring someone because a relationship might be bogus is one thing, barring someone because of their earning capacity is a different kettle of kippers, but guess we'll just have to see huh.