'You can't put a price on life' - really?
'You can't put a price on life' - according to most industries you can. Complex formulaes are utilised to determine the point at which it is commonly regarded as uneconomic to further safeguard against loss of life. Seperately, many people would cogently postulate that a similar balance should be struck between the saving of a life and the safeguarding of civil liberties. This latter point generally doesn't relate specifically to airport security, rather to intrusion of the State into whatever it's agents feel like concerning themselves with.
The general point is a reasonable philosophy though.