its true in some sense, if the pay goes out the window for scientist they will flee. theres already problems in the us getting people from undergrad to PHD(thats besides the current attack on it). such as wet lab work prior to graduation, plus who can even apply to grad school, if you dont have barely just to be under the requirements of grad schools. job prospects is low.

also grad school is more expensive since its not considered undergrad courses, and they charge more and you get no priority in classes. the biggest is wet lab work, where do you find it, catch 22