It is very doubtful going to another planet will help the earth. The reason is, the amount of resources required, even for a dozen people to go, is huge. Try to multiply that by billions of people. The earth would need to be stripped naked of resources trying to cover that tab. To protect the earth and humanity, we would need to pillage the earth to ship people to another planet, dah.
Hawkins might be thinking in terms of only the elite able to go. We only can use enough resources to ship the most important and connected people. The pions need to stay, but shipping only the elite will leaves some resources. The question become, who decides who will go and who will stay, since we all can't go.
One second thought, maybe Hawkings is onto something. If we can get the elite to think and act like they are the only ones who are important enough to escape, this will purge the earth of many of its problem makers. They will think they are most important, so they will leave willingly. The earth is left with the pions who will restore the earth.
For example, say all the polititians pulled in favors to escape to Mars. Once the ships set sail and we all look depressed being left behind, one source of the problem is now gone. When out of eye-sight everyone cheers, since now we can rebuild. Once they get where there need to be, since there are no pions to manipulate, just a bunch of wolves, they will make each other extinct. The earth is purged. Hawkings is quite clever.
