You've got this money thing.... Everything is not just about money!
It certainly is. Everything in politics is about money, as proposals have to be funded somehow. Virtually every political decision made has a financial implication.
This could presumably be accoomplisehd through legislation.
And where would the Polish Government get the billions needed to buy out the foreign banks?
Admittedy, it's more difficult now with Brussels interfering in everyhting, but rules could still probably be introduced to encourage Polish majority stakes.
But why would Poland bother? It's far easier to keep a tight grip on the banks - you'll find that Polish banks are actually very well regulated. The recent ban on EUR/CHF mortgages is just a small example.
Even a ban on foreign banks would be possible. Poland hasn't lost all her sovereignty, has she?
You can't ban other EU people from holding properties in Poland, it just doesn't work like that.
Tell us - what purpose is there for banks to be only Polish owned? Do you need to be reminded that Amber Gold was very much a Polish operation - and that I for one wouldn't put my money into a Polish bank? (nor would I put money into an Spanish or Italian bank, for that matter)