If by "corruption" you are implying some kind of quid-pro-quo, that's not how it works. Academia is both extremely decentralized and extremely competitive, and

If by "corruption" you are implying some kind of quid-pro-quo, that's not how it works. Academia is both extremely decentralized and extremely competitive, and any department that prohibits publishing in non-OA journals is unilaterally disarming and will find hiring and retention very difficult. It's basically the Prisoner's Dilemma in action. I would love to throw out the entire system and start from scratch (this is not an uncommon sentiment, especially among ex-academics who moved to industry), but the only way this happens is if the major funding agencies impose these decisions from the top down. And that is indeed how the most progress has been made, thanks to the NIH, HHMI, and so on.