The closest I come to working with part-time, minimum-wage workers is working with student employees. Even then, they earn more and usually work more than five hours a week.
Most of the time, I end up putting in more work than I get out of it. Onboarding, reviewing, and mentoring all take significant time.
Even with the best students we had, paying around 400 euros a month, I would not say that I saved five hours a week.
And even when they reach the point of being truly productive, they are usually already finished with their studies. If we then hire them full-time, they cost significantly more.
There use to be a mythological creature on irc from south America (sorry forgot the specifics) who was both a 10x dev and a 10x mathematician. One day he showed a picture of his computer. It was a low end laptop with a tft monitor and an external keyboard because the screen and the keyboard didn't work. It explained everything, the machine was just good enough to write code, do math, read stack exchange and lurk irc with his ghosts.
With a subsidized cost of $200/month for OpenAI it would be cheaper to hirer a part-time minimum wage worker than it would be to contract with OpenAI.
And that is the rosiest estimate OpenAI has.