Squeezing them where it hurts

From Slugger - not only are SF MPs at risk of losing their allowances/expense account but SF MEPs are under a similar threat.
I don't know the full history of why SF can get away with not taking an oath to the Queen i.e. not serving as full members of Commons but still get an office/expenses.
It seems that SF continued to line their pockets without ever having to face the duplicity of a democratic mandate that is not materialised in actual democratic representation. This is perhaps a long overdue sacrifice for their politics of sectarianism.