i was reading this on the BBC site earlier on yesterday (before anyone says anything i am not an affiliate of them

) personally i cannot see a problem with this.
the incentive is to ensure people who attend work consistantly are in line for possible rewards because of the hours they put in.
royal mail as a service cannot afford to lose the 10,000 workers at one time it claims, so its an enticing prospect to offer its workers something back.
before they start claiming they want more money i would like to see how much they actually get, each job has its price.