I recall being a classmate to a senior government official who kept telling us about the amount of money they earned. The driver would bring her to class, wait for her and take her home after class, way past 9pm.
Still, I know a driver to a senior person at the county level who has no idea what his working hours are. Everyday after work, he takes his boss for a drink and will only go home after he has dropped the drunken boss at home, be it Monday or Sunday