Don't be so naive: The benefits to Merkel and Co. are pretty obvious. Virtually every refugee who then becomes a German citizen will vote for her and her party almost until the day they die. This might entail some manipulation of the Muslim demographic, which could itself involve some pretty ridiculous and two-faced policy - but hey, that's the price of securing your power for the next generation or two, right? The other obvious benefit: more high skilled workers competing for an ever-growing pool of jobs. This helps increase those wages, which unfortunatley puts more money in the pockets of the elites - you know, the ones who finance and control most of the politicians.