My post was not so much my personal view but more a cry to those clever posters on here to persuade me why. At present, it is just discussed in potential and theoretical risk - where any well thought law can carry the necessary checks and balances to address them.
Thus, while tracking movement through phones by government is not yet standard, MI5 etc. will do this for high risk subjects (no objection from me); and this already exists as a nasty issue with e.g. women forced to upload apps on their phones in controlling and coercive marriages.
The point is - what do you care if there is a record of you driving to Tesco to buy milk? How would it be used by the state to have any meaning in your life? If someone was to disappear, it could be used to trace them; if there was a murder it could be used to check an alibi. Both good things, no?
Also, if you genuinely think our spending and website visits are not already data stored and retained by those who readily exploit it without your permission, then you haven't been paying attention. On that, the cards will only shift the tech, not the fact.
Lawbreakers will, of course, not comply. But that may make it easier to divide them from the population who do comply and thereby make them easier to detect and control. You never know...