The resources won't be used efficiently if the few with all the power/money can press their priorities on the rest of the populace. In the US, this takes the fo

The resources won't be used efficiently if the few with all the power/money can press their priorities on the rest of the populace. In the US, this takes the form of billionaires heavily influencing government policy, both through party funding to draw up the legislature and propaganda to win votes. In looser countries, this effect is even more direct. You have to count on benevolent tyrants if you allow wealth concentration to run its course. That's hoping for a lot.