It is a startup wisdom that stagnation (i.e. no growth) means death.
The often stated reason why C-level executives are paid so well is that they have to be able to solve the insanely hard problem of finding new growth opportunities for the company over a long(er) period of time; something few people are capable of.
Well: by this criterion, many CxOs fail to deserve this huge pay (more precisely: they build Potemkin villages to pretend growth where in reality they burn the company's substance).