The way things work right now is not an indication of improving the genetic quality. Actually women are not after genetic quality but after living their sex and the city dream searching for "mr big". If a nationalist has to accept this, along with the sad reality of capitalist society, then those who benefit from this can keep their nation and try to improve its genetic quality instead of asking others to be cannon fodder. Especially in countries where you don't get employment (thus a chance to create a family) if you are not a supporter of the political system.