Heard on the news today

Heard on the news today that the government have finally backed down and are allowing non police checked people to teach in the schools due to the backlog of unchecked teachers. Some schools in our local area have had to close as they’ve not been able to get their staff checked before the school term started. Why on earth did the government decide to insist on this rule without having the staff available to run the checks? Now there are potentially teachers caring for the children who have not been vetted by the police…What i’d like to know, is why did they wait until now and not do this years ago?