The market has already degraded into oligopoly. Spirit and/or JetBlue folding will only make that worse.

This seems to be a common theme in politics. A bad decision was made by the previous generation. Now the current generation, seeing that the decision was bad, makes decisions that should have been made in the first place. The problem now is that the bad decisions have already been made, and what at one point would've been a good decision is now either exacerbating the problems caused by the bad decisions or is at best failing to remedy them.

It comes up a lot in healthcare and immigration for example. What constitutes good policy is highly conditional on the current state of the world.