I'm with cabinkitten on this one, and largely on grounds of safety. I recall an unusually quick AMS-MAN flight where the carts were mobile until well after the seat-belt lights went on.
One possible downside is job security; the reduced workload would account for EZY's complement of three C/C (crowd control?) per 733.
Perhaps gloop dispensers should be fitted next to the oxygen masks, 'gloop' being a paste-like mix of nutrients, caffiene, alcohol and anuretics. Patents pending...