I believe that God gives us the free will to do good for him - and in the end, the choice to not do good is the ultimate sin. He would never want us to ask him to be good for us.

If God is all good and all powerful, why would he let these things happen to begin with, let alone fix them when we ask him too?

I'm not saying don't pray for people, but don't count it as the good deed you're doing to improve the world.