My explanation is the problem lies in the food source, not antibiotics. We can't rely on the continuous increase in the use of antibiotics to prevent a food cataclysm.

Presumably any newly developed antibiotic would be sold for prices similar to existing ones, if not for a premium. If this results in decreasing profits, then we must conclude development costs are rising, which suggests finding new antibiotics is increasingly harder. Sure, we can throw taxpayer money at it to have more drugs developed and introduced in the near-to-mid term, but if finding new antibiotics is indeed continuously harder, at some point it will also be too expensive for public money to finance R&D

We have to aim to solve the root cause, not just mindlessly continue to throw money at it