"Can one group of employees be so richly rewarded, the traders, for essentially speculative, impersonal, short-term trading activities while professional commercial bankers providing essential commercial banking services to customers, and properly imbued with fiduciary values, be confined to a much more modest structure of compensation?"

Really, what the Volcker Rule boils down to is the government forcefully simplifying banks so certain employees get paid less. Mr. Volcker is upfront about this fact. In a letter to regulators commenting on the rule that bears his name, the former central banker wrote. 

Crain’s