Ashitaria, you're being kinda rude.
Asking why overpopulation is a problem is a legitimate question.
If we don't halt population growth with justice and compassion, it will be done for us by nature, brutally and without pity - and will leave a ravaged world.
I don't really see too much of a problem.
So. Here's the thing. Overpopulation is caused by thousands of decisions. And they're not our decisions. Thousands of couples have children, and choose to keep them, with the belief, hope or optimism that they will be able to provide for them.
I recently read "Ishmael" by Daniel Quinn. He pointed out something really good: We can try to stop starvation, by increasing food production. But as soon as we have more food production, our population immediately increases. We ALWAYS have more mouths to feed than we have food for. It's a chronic problem for society.
And since it's a chronic problem, sure. It sucks. It causes starving and suffering. And the children doesn't deserve. But, is it fair to reduce their freedom to try to have more kids? And
try for a successful life?
I dunno. Birthrates in India have dropped now that it's becoming more industrialized. I think that the "underpopulation" problem of industrialized nations will spread to 3rd-world countries (as they become industrialized) and will eventually solve the overpopulation "problem".
As for resources, meh. Yeah, we use up a lot. But if we were actually running out, the prices of resources would be skyrocketing- it would be impossible for us to buy any of the materials because of the prohibitively high cost.
Also, your solution would be highly targeted at 3rd-world developing countries. It's not going to be popular, it's going to be seen as hurting their growth, as racism, as genocide, as disrespecting their culture, and as 1st-world manipulation.