I once did the books for a not for profit org. It was the most profitable not for profit org you'll ever see...except on the books.
The last health insurance company I did the books for had a 12% admin cost. Their HMO/PPO had from 12%-20% (15% Average) admin cost depending on the line of business.
Medicare hovers around 3% admin cost. Therefore Medicare is much more efficient than private insurers right? I actually hear that argument all the time. It is bogus, but it an argument against capitalism and for social medicine. Again...bogus.
My point is the 8% Vs. S&P 15% argument is a pretty standard one. It does make a point to an extent but there are many more variables involved and it is too simplistic.
Different book keeping practices (all legal, just different lines of business), different profit centers, and let’s not forget MACS mantra.... We have a choice on some products but not on energy resources (not a total choice anyway, you do have degrees of use etc... but it's not like buying sandals).
Remember the Michael Douglass Wall Street line "Greed is good"? To an extent this is true. I am a capitalist and think companies should profit as much as they can.
But let’s not pretend the oil companies are not greedy. That’s pretty disingenuous.