People see their jobs as a lifestyle choice – esp young middle class students, who pursue brand-specific jobs eg specific coffee chains, clothes shops despite low pay and few benefits.  They will even display fierce loyalty to their employer eg covering shifts, getting to work despite adverse weather conditions.
Negative effects of this are that wages remain low, and working class students (who are arguably more in need of the income) find it harder to get jobs.
 
Yasemin Besen-Cassino, Thinking Allowed, Radio 4