There will never be a pilot shortage.
In the extremely unlikely event one of the desirable flying jobs does not have 10,000 resumes on file, they will simply lower there standards till they get 10,000 resumes on file.
In the sixties there was not a pilot shortage. Yes good companies were hiring 250 hour pilots but the classes were filled with as many bodies as needed and there was no shortage or limit to growth.
The standards just get lowered and the classes get filled with less competitive candidates. But as the overall standards go down, the lower standards become even more competitive because then key items of employment become less quantitative and more qualitative which are much harder to define and determine.
THERE WILL NEVER BE A PILOT SHORTAGE!