The other part might be just the organic result of shoving the complications of varying hourly load and varying worker availability week-to-week onto those willing or desperate to work extra hours.
Schedules get jumbled, work hours get fragmented like a garbage collector's memory management without a compaction step.
Much of the "middle" (or upper middle, however you want to label it) class's luxuries are based on goods and services being cheap enough due to the people at the bottom not having a choice but to deal with unsteady income and changing schedules.
I am actually enjoying stores and restaurants closing early because they do not have enough employees, or prices going up so that people cannot constantly afford to eat out. It means there are people that can finally be home with family at dinner time, or if they are working, they are earning a premium for evenings, nights, weekends, etc and perhaps they themselves will be able to enjoy those services.
Some people claim it's done intentionally to prevent workers from working other jobs where they might get tired or escape the first job.