While I don't mind tipping a waiter for great service I don't see delivery drivers and car wash employees are included. A tip is just that, "great job, here is a little something extra for yourself" it should not be expected. I give a gratuity to my door man at Christmas because he goes the extra mile and is awesome. I don't necessarily give the same to the others. Tips/gratuities are for going above and beyond, not just providing the service they are paid to do.