Ruminating on my earlier mortification, I realized that my mistake was actually accidentally onto something vaguely interesting. After checking my math (note to self: always check your math) then asking FRED, I produced this lovely graph:

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Assuming I haven’t fracked the pooch yet again, what this ought to be telling us is RGDP-per-capita over the population:worker ratio; ie, the share of RGDP-per-capita that actually ends up in workers’ pockets assuming a perfectly even wealth distribution. This may or may not be interesting.

For those who crave trendlines: