There can be no engagement whilst there is "under-employment". Under-employment is where people are employed at a level below their capabilities. It is different from being overqualified as it infers the problem is the fault of the employer.
Experienced pilots spending 5-10 years as a Second Officer (no takeoffs or landings)? 15-20 years to command (even at SQ a command is 5-7 years for ex-military and 8 - 10 for cadets).
There needs to be opportunity before there can be engagement.