Your estimates do not account for speed of delivery. If an AI can deliver 10x faster, the target is less than 10x a dev salary.

But 10x faster also gets you to market sooner. Which has value.

I could argue in all the ways my personal experience disagree, but lets just Occam's razor:

Most people agree big orgs regularly have dysfunctional incentives. We've seen it happen a thousand times.

Your suggestion requires we also assume a 10x faster delivery time by people spending 200$ vs 1000$ - something I've yet to witness or hear a credible account of.

So while that might be true in a small number of cases, in general its foolish to go with the "10x delivery speed" hypothesis.