It's already starting to show that it's unsustainable, but how long until it outright collapses? At some point education is going to move online. Political Science isn't one of the more valuable degrees to have, so students will increasingly stop pursuing it in favor of related subjects like Econ or unrelated ones like STEM.
I think the current generation of fulls and even Associates will likely be fine. APs might be in trouble and grad students are looking totally screwed.