Technology can alter these economies, and I am certainly not saying we should all go to subsistance farming to avoid the paradox. I think making the calculation “equipment=making X lives” is a little off the mark: typically, you’d subtract Utilions (if you are trading for the mining equipment) and add workers. (for repair/maintainence) so you might end up with, say, 12 people, 10 who mine and 2 who repair, and 85 utilions rather than 100. But the end math of who gets how much ends up about the same as your hypothetical.
Technology can alter these economies, and I am certainly not saying we should all go to subsistance farming to avoid the paradox. I think making the calculation “equipment=making X lives” is a little off the mark: typically, you’d subtract Utilions (if you are trading for the mining equipment) and add workers. (for repair/maintainence) so you might end up with, say, 12 people, 10 who mine and 2 who repair, and 85 utilions rather than 100. But the end math of who gets how much ends up about the same as your hypothetical.