Speaking of multinationals:
To be honest, I see absolutely nothing good in the very existence of multinational companies (and banks). In my opinion, each single one of them should be broken down to its current daughter companies. And especially when their daughter companies are in different countries.
If I had a say, all multinational companies without exception would be forced to sell any and all daughter companies that are based in different countries, or to just give them up, with each of these formerly acquired companies operating, and producing, only in the country where they originally were founded in. That means for example that the PSA Group would have to give up or sell Opel, and Opel would be then only operate and produce in Germany, because it's the country where Opel was founded in. In the same way,the Volkswagen AG would also have to give up or sell Skoda, SEAT, Bugatti, Ducati and so on (simply because these companies are based in foreign countries) - and would have to produce their VW cars in Germany only.
I also think that no company or bank, no matter where they're based at, should be ever allowed again to buy into companies based in a foreign country, or even to buy them entirely. And I think that any and all companies currently owned by foreign banks and companies should be either deprivatized, or bought by the state they're based in (I'd prefer the former!).