Why it's time to push back against electronic tipping

Settling a restaurant bill these days typically involves slipping your credit card into an electronic device, which then asks for your PIN before smoothly inquiring about a tip. How about leaving 15 per cent, 20 per cent or 25 per cent? In bolder restaurants, the suggested tips may be even higher.

http://www.macleans.ca/economy/business/why-its-time-to-push-back-against-electronic-tipping/