I've long wondered why there isn't a significant levy (say $15) on existing antibiotics that goes into a fund for the development and release of new drugs. All

I've long wondered why there isn't a significant levy (say $15) on existing antibiotics that goes into a fund for the development and release of new drugs. All antibiotic users benefit from new antibiotics, it would discourage overuse of existing antibiotics and provide significant funding for development. A few large western countries working together and such a fund would quickly reach hundreds of millions of dollars.