TTP/Global Entry sort of fixes this. What really fixes it is flying private. Unfortunately, that's doesn't do much to help the carbon problem.

The real difference now is that flying is too affordable. It used to be, only the rich could fly.

What we need to do is make air travel much, much more expensive, out of the reach of most people except on special occasions, and we can go back to having (1) less unnecessary carbon emissions from people flying to Disneyland or whatever shitty resort they spend their vacations at, and (2) very short waits at the airport for people who need to get somewhere in a hurry and can afford it.

Environmental and efficiency problem solved.