- Research is not embarrassingly parallel. Adding researchers doesn't lead to more different things being researched (see also, Amdahl's Law), but to multiple groups racing to research the same things.For the most part, useful research directions can be identified with far less effort that it would take to actually explore them. (It's not that ideas are harder to find, it's that researchers can't be allocated efficiently.)
- The "publish or perish" constraint that's famous from academia applies to patents. Researchers prefer to split up their results into as many separate patents as possible. (patents count is not a consistent measure)
- Research is not embarrassingly parallel. These split-up ideas are not independent, but form a chain where each builds on the last. Each small patent still gets referenced in all the following split-up small patents. (the "breakthrough patent" measure doesn't work)
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Unrelated to the above... haven't there been articles in recent years complaining that it's harder for young people to get jobs because old people are staying working longer? Assuming that's actually true, could the constant-ish growth rate and recent decline in that rate be similar to the "science advances one funeral at a time" effect?
I don't know what the solution would be. I tend to favor letting the market figure it out but dunno if that can happen here.