Everything comes down to economics in the real world, we don't live in a vacuum free from money constraints, but if you want to play the conspiracy game, let's do it.
So if they were to get rid of abortion, how much growth or white power do you think you would come from it, because you do realize everything is relative so the same advantages/disadvantages white people would get from lack of abortions so would the rest of the world. While you are scratching your head trying to figure that out, tell me how many Christian conservatives trying to take over the world with white babies, have abortions in the first place.
Your logic is flawed, this is what happens when you believe in crap you heard regurgitated million times without sitting back and questioning if its even plausible.
Now take my argument, of them giving us the rope to hang ourselves. This has always been the M.O. of the white man, matter of fact if you have ever been in a corporation that is trying to the downside, usually the kiss of death is when they start giving the workers more rights and money, knowing damn well that the average worker will start to abuse these privileges, which in term will be used for their termination. I really believe that they will relax most drug laws, fuck with abortions, knowing damn well that undisciplined people (usually the poorer urban dwellers) would abuse these privileges, and within ten years it would be used to usher in tougher and sticker laws. Unlike your theory at least my hypothesis is plausible and constant!