Earlier quoted context omitted.
I interpret meritocracy as being judged by the outcome of your doings . If someone has IQ 10000 but spends it to dominate WoW, then... I don't see why they should be paid a lot (some other people might disagree, though). Likewise, if someone leverages their genetics, family, wealth, skills, efforts, and luck towards great outcomes (e.g. Elon Musk), then they should be rewarded, as they're meritocratically the best .…
Power doesn't work like that - it accretes to those who are able to leverage it. You generate a permanent power disparity with a gloves off laissez-faire system like that. I'd worry about your definition of "best society". Is the current system an existence proof in your mind?
Yes, the current system (Western-style democracy, capitalism, freedom, markets) is the most meritocratic of all systems realised so far (AFAIK), but that doesn't mean we can't do better still.