I ain't frightened of ID cards or CCTV either.... only those with something to hide should be.
This is the argument always used by those who believe the state should have unlimited and total power to know everything about everyone. And, just so long as the servants of the state - every civil servant, every police officer, every employee of the government - are paragons of virtue, would never be tempted to use information for their own ends, never lose memory sticks, discs, laptops, leave them on trains, buses, 'planes, boats, libraries, always encrypt every single bit of information, then the system should work just fine. Shortly, unless you take specific steps to refuse, your medical history and details will be available to millions of civil servants, so - as long as you don't mind your neighbours knowing your most intimate details, then let's go ahead and put everyone on a huge database.