I reckon we've been really lucky with the guys we have, they've been with us for over 3yrs now - never late, never sick (the very odd time but aren't we all), work quality pretty good, they both look after themselves too.
we pay a flat rate but they get bonuses quite often, all tips go straight to them and they get treated to a pub lunch every 4 weeks.
flat rate is £65 a day.
Before anyone says that too low, its £325 a week, not bad for no hassle.