Because "pay" doesn't just represent the stated hourly rate.
"Pay" is a combination of an hourly rate, hours of work available, overtime policy, benefits packages and working conditions.
So back to the questions:
Do you have any part time workers whatsoever?
Do you have any workers at all who aren't covered by your health plan?
Do you have any workers at all who don't have a reasonably-matched 401(k) plan?