Wait 'til you see the various benefits packages allocated to people with white collar jobs. Through my work I get a flat 4% off everything at Tesco. Sometimes I even get 6%.

The catch is that you have to (a) work for an employer providing the scheme, and (b) have enough cash in your bank account to pre-pay the account by a couple hundred pounds.

These systems are evidence that the sticker price is a tax on the poor.