In the U.K. you have to pay a premium not to use your corporate ID card. Tesco for example will charge a 20% markup on lunch for privacy.

Interesting, got more info? Which corporations provide the ID card? Are retailers legally obligated to ask for it? Do retailers get fined by the gov't for every non-ID'd transaction?

This _could_ be taken to mean that Tesco employees get a 20% discount if they flash their Tesco ID card, which sounds completely normal to my American self.

If you don’t get a Tesco (Major U.K. corporation) ID card scanned at the till you get charged a lot more for your food.

This is normal customers, not employees.