"Please instruct your enforcement teams not to proceed with enforcing any student refusal cases unless they are deemed, at at least inspector level, to be a priority due to Harm (a reference to the Home Office system of gauging how harmful it is for an illegal immigrant to remain in the country).
One naturally wonders how many other enforcement areas have been cut where the memo for it has not been leaked.
I'd estimate at least since FDR, with a few interludes of sanity such as JFK's tax cuts and Scoop Jackson's defense spending.