I don’t think putting more money into the system makes the ideas better. We have way more money and people in science in the last decade than in 1960.
The brains are the most precious resource, not the money, and they should not be bothered with trivialities.
It takes a whole lot of implementation and organisation to make any innovation tangible, so in some ways a bigger overall society slows things down as much as you gain from the total number of researchers.
Competition from foreign societies is also a part of this.