I don't really follow that logic though. If I were at home I could knock up a spaghetti carbonara for two people about 2 pounds, but if I am out with 4 clients and the bill comes to 50 pounds a head then why should I feel it's ok for me to pick up the tip when 15% is 37 quid? Even if I dine alone in an average restaurant then the bill would be around 30 pounds so I am paying 3-5 pounds of my own money to do the company's business. That's not right. It penalises people who travel for work.