The Scottish National Party wants the annual earnings of the Prime Minister to be cut from £161,866. It has forced an Opposition Day debate on the matter and will vote on the motion later today.
Demands for the cut are part of a wider motion that if passed would also suggest the Commons has no confidence in the Prime Minister to do his job.
The motion is simply titled “Conduct of the Rt Hon Member for Uxbridge and South Ruislip” – the constituency Mr Johnosn represents.
SNP MPs say they want “his ministerial salary to be reduced by £41,567 per year”.
The total would leave the Prime Minister of the United Kingdom earning considerably less than the Scottish First Minister.
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“He has a genuine need to provide for his family, all of them, and I think that does worry him.”
Another added: “Boris, like other prime ministers, is very, very badly served.
“He doesn’t have a housekeeper — he has a single cleaner and they’re worried about being able to afford a nanny.
“He’s stuck in the flat and Downing Street is not a nice place to live.
“It’s not like the Élysée or the White House where you can get away from it all because they’re so big.”
Announcing the motion at the weekend, the SNP’s leader in Westminster, Ian Blackford, attacked Mr Johnson for being “embroiled in sleaze and misconduct, lurching from one scandal to another”.
He added: “The charge sheet is utterly damning and he cannot be allowed to get off scot free.
“No-one is above the rules, not even Boris Johnson.”
Given the Conservative Party’s sizeable Commons majority, the motion is unlikely to pass.