Why are drug costs so high?

Apparently the cost of research and development isn’t the cause.

Large drug companies simply can’t afford to keep spending as much as they are now, when about 10% to 20% of revenue goes to R&D

That’s 10-20% of drug company revenue, not including the markup your pharmacy and “health insurance” company add.  I wonder how much of the remaining 80-90% is spent, directly or indirectly, on lobbying and enhancing their privileges.