[Bloody Sam Roberts]

Look at what Novo Nordisk spends on insulin production and what they take in from the sales of same. Think they want to see a cure for diabetes anytime soon?

[caveat emptor]

The biggest medical conspiracy ever, The National Cholesterol Education Program, led to fame for the conspirators, fortunes for the co-conspiring drug companies - billions and billions - and unnecessary health problems for the victims, ie. patients. See eg. here, here, or here. A good summary of the history of cholesterol can be found here.

Different context, but captures the enthusiasm of drug companies for the huge profits from sales of statins.