yes, the allocation problem is thornier, and valuing science properly more so, but it's pretty obviously working badly in our current politicoeconomic system. we can't both hoard wealth and power and expect good allocation. concentrating societal decision-making into fewer and fewer hands inevitably leads to bad and self-serving decisions.

with that said, once $5T (or whatever) is allocated to science, it's a matter for the decision markets in and around science to sort out allocation within. that mechanism has the best chance of coming up with the best available (but unlikely perfect) answer.