> researchers need to fight for scarce positions and scraps of funding

there is quite a lot of funding

> often paired with too much bureaucratization (selection processes that look at "objective" and "verifiable" metrics

this is the problem.

The whole OP reads like a bizarre hit piece on open access. How could scientists paying to publish their work incentivize them to publish more? How would spamming the world with more publications inflate a scientist's impact factor? (It wouldn't -- impact factor would be diluted by the spam)

It was always possible to self-publish and to cite self-published work, and even without journals, a modern scientist can publish on a free webhost for even cheaper than an open-access journal.