The problem is that people who might be the best person for the job are being excluded from applying because of some totally irrelevant, minor misdemeanour from there distant past. No one is suggesting paedophiles get jobs in schools, or pyromaniacs get jobs in firework factories. If the conviction is totally irrelevant or minor and obviously from the distant past it should not be disclosed.
Think for a moment of the number of people from abroad who work in the caring services with the sick, elderly, mentally and physically handicapped. CRBs are not international, foreign people can not be, and are not, checked for working with these vulnerable people.
And if CRBs are introduced for more and more jobs you are effectively discriminating against British workers whose records can be accessed, for foreign workers, whose criminal records can not be accessed.
Does that seem fair to you?
People should be allowed to rehabilitate themselves otherwise what do they do? Do you want to pay for British workers on the dole while foreign workers with totally unknown criminal records are given preference.