So, bring your corporate/private airplanes to America (where we already have more than all other countries) and enjoy our pilot-friendly FAA rules.
I doubt that this is going to happen on a large scale. The new tax haven right now in Euroland seems to be the Isle of Man which has its own registration (M-XXXX).Maybe low(er) tax can justify the additional need to train your crew for JAA licenses?
IMHO, the best certification one can have are dual licenses (FAA and JAA). It's sad to see this thread having turning into a p!ssing match thanks to ignorant comments made by Koi.