Interesting that this exact sort of reasoning was used prior to WW2 to justify the oppression of the Jews and continues to be used by anti-Semitic groups to this day. But it's OK this time around...
In fact this is part of the results of a study I read a few days ago.
It says that the earnings of the management in big companies cannot be controlled as they should, because the board of directors / board of management doesn't control them as they should, because they all tend to belong to the same social class.
Here, it is currently widely discussed that the earnings of the management are so high - which sounds quite weird if the management people belong to almost collapsed banks and still demand millions of Euros as their earnings. (Currently in the case of Georg Funke of the Hypo Real Estate bank - which is held upright only with Billions of the German government !)
The study argues that a management could work more effectively - a try to reduce corruption - if it was better controlled.
For such a control there's usually responsible the board of directors.
But - as the study says - this kind of control is not effectively enough. It should be more rigid, the study says, so that decisions of the management can be properly analysed whether they make sense or not.
In the case of the management earnings, they are not discussed thoroughly enough, the study says, which in fact means that the earnings rise despite making sense.
This applies not only on the management, but on all parts of a company, of course, if corruption should be battled effectively.