Not really. It's not much different to what the powers that be and journalists over here seem to be suggesting to sort out the lack of quality English youngsters. There's nothing illegal with what Bilbao do, indeed they should be commended for making sure that local players get every chance to succeed. They're successful at it too - Bilbao have played in the top flight since La Liga was born in the 20's, one of only three clubs to claim that 'honour'. I think it should be encouraged.