How we exaggerate boss responsibility

I've met more leaders than I can count who shamelessly inflate beyond realistic their sense of responsibility. They do not suffer from bouts of humility. Worst of all. They are supported by the continued industrial mythology that bosses can and should be held responsibility for their subordinates' collective performance. In an information economy is this an insane and undeliverable expectation. No boss's decisions or actions could ever substitute for or supercede the collective efforts of any team. The corollary question is about rethinking the widening compensation gaps that follow this premise.