Organisations can become too big to fail. The ones with the right political connections that can access public funds should their flounder for any reason.
Similarly, certain management executives can become too senior, too well connected, too well entrenched, to be accountable for their decisions.
In a severe economic downturn, or when faced with self-inflicted disasters, an organisation that is too big to fail will get bailed out by public money.
A “too senior to be accountable” executive gets a guaranteed golden parachute. Despite our supposedly meritocratic culture, their actual performance or contribution to the organisation appear largely irrelevant.