Hilarious
So these government departments have been employing contractors outside IR35 and now have to stump up PAYE+NI+NI. Not really a problem as the money goes to the government, which can hand it back as an increased budget (+ bonus for the department heads).
If the contractor is smart, they will claim back the taxes they paid. Net result is a loss for HMRC instead of what they claim is increased tax revenue from their enforcement actions.