Korbyn was actually "Agent Kob" and paid by the Hungarians until the late 80s! He is entirely devoid of real work experience (typical for a "Labour" MP) and has been monitored by the Special Branch since his predilections became apparent with his support for "PIE" in the mid - 70s. SB knew that he could be blackmailed by the Hungarians (or their Russian masters), so Kob never got a real security clearance. Had he won the last election, he would have been immediately replaced "due to failing health" - there were contingency plans for this scary result in Whitehall since well before the 2017 election.
He's a thoroughly nasty, unprincipled, grasping champagne socialist of the very worst type. He sent his son to Public School (one rule for the plebs and one for the leadership), and is worth in the region of £6m, plus his undeclared properties. He's lived off his wife's coffee business (which is under investigation by the Mexican Government) and his property rentals (that he somehow failed to report to Parliament until they were revealed last year by the Telegraph), because he claims to give his Parliamentary salary to "charity".
His support for every anti-British cause (IRA, Hamas, etc) is well-known, and his anti-Semitic views are plain to see. He and his supporters have deliberately driven Jewish members out of the Labour Party.
He's a truly horrible man, and shouldn't receive his Parliamentary Pension when he retires, on the basis that he's always done all he can to undermine the UK throughout his "career". He was elected to the Labour leadership as a joke - mostly by Conservatives who paid their £3 to vote him in. Milliband's £3 membership idea has rendered the Labour Party unelectable for a generation!
"Why is my rig humming?"
"Because it doesn't know the words!"