It might change depending on exactly how you define efficiency but the UK system scores highest in some global comparisons in terms of bang for buck.
From the way you phrase it I assume you actually mean inefficient service, like you'd get at a high end restaurant or hotel, where they have lots of people hanging around doing nothing a lot of the time so no one ever feels they're being treated less than a VIP in busy periods.
From the way you phrase it I assume you actually mean inefficient service, like you'd get at a high end restaurant or hotel, where they have lots of people hanging around doing nothing a lot of the time so no one ever feels they're being treated less than a VIP in busy periods.