Could Royal Mail sell-off lead to stamp price rises?

Sarah Coles
Protest art
Protest art

The Royal Mail sell-off has already led to speculation that it was priced too low, and that the taxpayer has been ripped off in order to let investors make a fast buck. However, it gets worse, because on its first day as a publicly traded company, the Chief Executive seems to have hinted that stamp prices could be set to rise.

But how can that possibly be fair?