Dude, do some research. I'll accept, it's mainly the middle east where people are trafficked from, but it's mainly western Europe and America that they are trafficked to. And there are people trafficked from western Europe, too. That means that both the middle east and the west have trafficking problems. And since human trafficking is modern-day slavery, I think we can agree that slavery is a problem in the west.
Also, if we spent money getting people out of poverty, there would be less crap on the streets for the pigeons to feed on (because there would be less food lying around that homeless people have dropped/not been able to finish) so that would actually help to reduce the pigeon problem. Maybe try thinking about the causes of your problem, and whether or not there actually is a biger issue that you could be dealing with.