In order to protect civil liberties, as well as prevent unecessary discrimination against individuals.
With the current system, an advanced CRB is required for not just teachers, nurses and other individuals that work with children and vulnerable adults, but for taxi drivers, lawyers, accountants (and other professions with legal protection).
Now if someone was convicted of Fraud 10 years prior to applying to be, say an accountant, it is understandable that this must be disclosed to the employer for the safety of the business. However, should it be the same for a caution for Driving without Due Care 10 years prior? For this would also show up.
What this campaign is not argueing for is the deletion of criminal records, non-disclosure of relevant offences or non-disclosure for any offences committed within 5 years.
What it is argueing for is a common sense approach to disclosure that supplys relevant information to the employer that is not in excess, and that information that is irrelevant to the job role is "weeded" from the disclosure.
Scotland currently has a "weeding" procedure for old, trivial and irrelevant offences (violent and sexual offences, as well as more serious ones are never weeded from the record), so why is England and Whales still lagging behind, desperately holding on to the nottion of an all-seeing, all-hearing Orwellian state?