OHSU is classified as a "non-profit public corporation" ( formerly a state agency ). It still receives a significant amount of it's budget from taxpayer funded sources.

2010
$1.85 billion ( operating budget )
$39 million ( state appropriations )
$392 million ( grant awards - federal  )


If any employees production doesn't cover his salary then having them on staff would be pointless, so your"benchmark" is rather meaingless. You haven't produced any evidence as to why he should be paid significantly more than twice the market rate for his specialty. He could be a good golfing buddy with the president for all we know.