Everyone is going to make this about money or unions or etc, but my employer briefly worked with some ATC employee groups and I can tell you exactly why they are short staffed: - The FAA has strict hiring requirements. You have to be mentally and physically capable, and by their own admission less than 10% of applicants are qualified for the job. https://www.faa.gov/air-traffic-controller-qualifications - The trainin…
Isn't this, ultimately, the real problem? Improved technology with radically more automation would both improve safety and reduce workload on controllers.
What's really needed is some sort of "next-generation ATC" moonshot project. But of course, in such a safety-critical and risk-averse domain, generational improvement is really hard to do. You certainly can't "move fast and break things", so how do you prevent such a project getting bogged down in development hell?