The Telegraph reports that "Smart travel card to ease global travel - Travellers will be able to ride the London Underground, the Paris Metro and New York's subway without ever having to stop and buy a ticket using new technology that could be ready within two years".
Once again, as with the EU Galileo system on which road pricing would be based, who will have access to the information that these 'smart travel cards' will contain? At first sight this looks to be no more than a furtherance of the "We will know where you are, where you have been" syndrome, something which is an aspect of any totalitarian regime.
Decades ago people used to provide intimate details of their life without a murmur, yet now the first question on most people's lips is "Why do you want to know that?" This just demonstrates that the trust in 'officialdom' has plummeted to an all-time low.
Personally I try not to use my card, preferring to queue and pay in cash where possible, regardless of what I have bought and/or what 'service' I have used.
Anonymity equals privacy in today's society.