There is another problem.When US starts fifth generation fighter aircraft program they receive fund from other NATO countries with an agreement so that they also get that 5th gen jets.But first jet developed by US is F22 raptor.,and when they realise F22 incredible application in strategic condition,
They develop a law ,so F22 cant export,insted they developed F-35.In any case F -35 is less capable than F-22.I am not saying these agreement also become like that.But after all USA is superpower and
we know very well about our politicians and bureacrats .A.K Antony may better but his sucessor we cant predict that.