Cost / benefit.
"....or a shade over £14m for each one of the 2500 lives saved."
I'm sorry, but this a debate that needs to be had. The 'elf 'n safety nazis have had all the low-hanging fruit and are now off on a kick to achieve the (patently impossible) target of zero accidental deaths.
The Truth That Dare Not Speak Its Name here is that the various pieces of legislation gradually chipping away at our liberties (and wallets) need to be subjected to rigorous cost (both monetary and in terms of inconvenience/privacy/personal freedom issues) to benefit analysis. This would, however, entail effectively putting a price on human life and the sort of dickheads that work in this business all have in common that they genuinely believe that no price is too high to pay, so we're f***ed as things stand.
@Whoever said that ABS and NCAP stars should be mandated: If you ever feel like complaining about the "nanny state", look in the sodding mirror first.