Is this true? Prove your claim.
”This is a real problem, and drags the quality of everything down.“
Let’s assume your first assertion is true. Is it automatically true that your second claim follows? Why?
I see no evidence that the individual productivity of scientists has changed much in the last 30 years, nor do I notice much of a change in the aggregate quality of science. Crappy science existed hundreds of years ago, and it continues to exist today. The main difference, as far as I can tell, is that we have a lot more scientists now.
In any case, these are just assertions, not arguments.