First, stop the misguided view that we're all equal. We're not. We should have an equal start in life but after that it's up to you, I'm afraid.
Second, make procreation means tested. If you can't afford children, don't have them. There should be salary bands that determine how many you can have.
Third, and probably quite controversial, stop trying to help some of the remote African areas that suffer persistent drought. We have probably inadvertantly killed millions more by trying to keep them going over the last century. It is very harsh and goes against our desire to be (or appear) altruistic, but it has done far more damage.
Finally, my favourite... Introduce a karma scale. Everyone has a chip implanted that records good deeds Vs bad deeds. If you are in the plus, you can offset your score for benefits or to punish those who are in the negative (within the same range as you). Get a mega high score, for example, and you can off a murderer or a nonce. But that resets your balance and you have to start again.
Vote for me for king of the world!!!