The gaffe-prone Shadow Commons Leader - often branded "clown" and "doughnut" around Westminster - is already under fire for moaning that £64,766-a-year MPs like him are treated like "s***" and forced to live on "rations".
Former oil trader Duncan - who gave it up for politics but is still thought to be worth at least £2.1 million - whined: "I really find it irksome to be labelled a multi-millionaire. I am not a multi-multi-millionaire. . .
"I certainly would have been if I'd stayed in the oil business, so you can imagine it gets up my nose that not only have I given up being super rich, but I'm accused of being super rich when I'm not."
Unbelievably he added: "It's one of those crosses one just has to bear in this game."
Duncan, 52, is regularly seen acting the fool on TV panel games and dressing up in daft costumes for the Parliamentary Palace of Varieties charity show.
Ironically this year he donned big ears and a mock crown in a crass attempt to lampoon someone even richer, Prince Charles.

Duncan's insensitive comments were made in an interview with Total Politics magazine in which he also whinged how he was "a misunderstood person".
But the people understand perfectly. And his foot-in-the-mouth outburst will infuriate millions of hard-working families who have to pay HIS wages and controversial expenses while struggling to make ends meet on their own.
Duncan's outrageous remarks were made around the same time he was secretly filmed at Westminster complaining about his measly MP's salary, for which he has been put on probation by leader David Cameron.
The blabbermouth declared: "No one who has done anything in the outside world, or is capable of doing such a thing, will ever want to come into this place ever again, the way we are going.
"Basically it's being nationalised, you have to live on rations and are treated like s***."
Ironically moneybags Duncan, who owns three homes, is the face of the Tories on the issue of the MPs' discredited expenses system - a system from which he claimed £127,658 second home allowance over six years.
Boasting about it on hit TV show Have I Got News For You, he sneered: "Fabulous system isn't it?"
Labour MP John Mann said last night: "Alan Duncan's proved again that he is completely out of touch.
"He's a huge embarrassment to David Cameron and has got to go."
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I say keep him. It shows the Tories for what they are - completely out of touch with the hard-working masses supporting their families on less than a third of his parliamentary "rations".
By Zed.. Posted August 17 2009 at 10:50 AM.