because this law would never be passed, remember the government isn't one body, they can't even get their own party to vote for their laws half the time, and this law would be unfeasable because of the likely hood of cards etc getting damaged frequently, and it would also be destroyed in the press, and such no mp would vote for it as it would be PR suicide.
Havant they passed a current law to detain a person for x amount of hours/days/weeks without charging them? Surely thats against human rights?
If they can pass that law, im pretty sure they can pass another law.