I used to think this way and was on your side. However, the problem of child marriage and molotov cocktails thrown at Jewish schools in Sweden made me rethink that proposition. I think limiting the welfare would lower the crime rates (because criminals would have to work harder), but it wouldn’t eliminate all the problems that Sweden currently has with “radical” muslim immigration (read the links in my previous post).
It’s difficult problem to balance out. Of course, if you limit all immigration from Iran, you give up a lot of talented, productive and calm individuals, but if you open the gates to everyone, you eventually bring the crime problems that those people have at their own countries and create new problems by clashing the cultures - anti-Jewish and anti-Israel “demonstrations”, no-go ghettos, rise of right-wing populist movements, rising racism and anti-Muslim sentiment etc… It’s really complicated topic.
PS. Iran is even exceptional case because the government is radical, but most of the population (and especially the immigrants are not). I have three friends from Iran here and they’re obviously fully westernised - they were brought up in Switzerland though.