The first person who loses his job because of a database or connectivity problem keeping him from gassing up on the way to work should be able to sue those who came up with this INDIVIDUALLY.
As I understand it there are big differences between employment practices and customs between the UK and the US. In the UK it would be highly unlikely for someone to loose a job over being late for work or even missing a whole day of work if such a situation was to occur. There'll also more than likely be an over-ride for the pump operator (such as for legally filling petrol cans or car's once an issue had been resolved with a few phone calls). The system will also more than likely be able to be deactivated should there be connectivity problems.
Personally I'm all for it. Vehicle Tax, MOT and insurance are legally mandated in the UK, the small minority that flout the laws cause plenty of grief for those that end up involved in accidents with those that don't have insurance (or safe vehicles) and drive up the cost for the majority who play be the rules.