So essentially the evil corporation isn't shoveling out enough product for you? That model didn't work (long term) for previous editions, what makes you think it would work now? When D&D was owned by a dedicated company TSR, the company effectively went bankrupt. For 3.x and 4, they had to do reboots to stay in business.
I still want to know what you mean by work (long term) because 2e lasted long term and 3e/4e book a month lasted long term and yet somehow a book every 6 months, which for the record has not lasted long term, is now the new success story.
With today's much more fragmented marketplace, I don't see how most companies could be profitable enough to stay in business for the long term while cranking out the volume of material some people indicate that they want. Unlike Tesla, most companies need to make a profit to keep the lights on.
Which is why they created the dmsguild.
It would be interesting to know how much the DMs Guild nets for WotC. I have seen a few authors giving figures for their sales and it does not seem to be much but who knows maybe it all adds up to a significant number.