The long term solution is to lower the population. We have too many people and too few resources.
I've heard this many times. Remind me again, what's the right population?
We are vastly overpopulated
So that's what, 1/10th the population, 1/100th is the right amount to you?
I believe survival of the next extinction level event is going to depend on people, both brain power and labor. If you don't care about such things then yeah, lets clear cut the world population and build bunkers.
Beyond that, I also believe more people means more interesting things in life. As long as people are housed, fed and educated, I think we're doing just fine where we're at.