this isn't a generational thing, it really depends on the position

my ex-company has a sales(SA) which is a baby boomer that refused multiple offer by the boss to become the sales manager because she made enough money being an SA without any distraction of being a manager and needed to deal with all of the managerial BS and attending all of the unneeded meetings every week and every month

she just want to focus on selling and maximize her commission, she doesn't fancy that little extra money from the manager position which comes with a lot of headache to deal with