In some weird way this symbiotic relationship between the drug and food industries seems similar to that of the food and chemical industries. I'm referring to how they genetically modify crops to be resistant to herbicides so that you can spray fields with even more poison without killing the crops.

Aka: creating a market

It is self-sustaining - in your weird symbiotic way - for the ORGS involved at least.

I came across this quote from Fauci when he was reporting before Congress (in 2004) on the need for more billions for vaccines to fight the non-existent Anthrax terrorists:

Biotech firms are our Industrial partners - they are essential to countermeasure development. But they want some assurances if they are successful that there'll be a market for their product.