How to find the missing prisoners

Large numbers of dangerous prisoners are in our midst and (surprise surprise) the Home Office can't/wont do much about it. I suspect that a simple way to round up most of these fugitives would be to run a check on how many of them are claiming welfare benefits. I recently asked the DWP what checks they make to ensure that new claiments have not escaped from prison. The response was that they didn't know but would try to find out and come back to me. I am still waiting so I think we can safely assume that checks are not made and that rather than hiding out in the wilds somewhere many escapees are openly residing in their former abodes and cheerfully cashing their dole cheques each week.