No they won't. They'll end up like every generation, idealistic until they start having to earn for a living, and then start turning more and more conservative

No they won't. They'll end up like every generation, idealistic until they start having to earn for a living, and then start turning more and more conservative as they begin to raise a family, try keeping a marriage alive over multiple decades, and start understanding the values of stability, acquiescence, etc. etc. Also, as the teens who will save us grow up, the younger generations will continue to transgress what little moral boundaries are left in society to the horrors of the teens who will save us, some of whom will probably overreact and many of whom will blame the younger generations when a new crop of problems come to them because the younger generations didn't listen to them (and the cycle will continue).