Anybody worth more than £1 million faces coming under scrutiny from inspectors in a fresh crackdown on tax avoidance announced by Liberal Democrat Treasury Chief Secretary Danny Alexander.
The move will mean 200,000 more people will be targeted by HM Revenue and Customs' affluence unit, set up originally to study the affairs of the 300,000 with assets and property of more than £2.5 million.
Mr Alexander, speaking to the Mail on Sunday at the start of the Lib Dems' annual conference in Brighton, said officials would "sniff out" anybody who was not paying their fair share of tax.
"The measure will apply to people with homes and assets of more than £1 million," he said. "The wealthiest did best in the boom years and it is right they should pay more now."
Mr Alexander said the affluence unit, boosted from 200 to 300 staff, would cross-reference files and records to spot signs of avoidance. "They will look at anomalies and sniff out any problems," he said.
Meanwhile, Liberal Democrat Deputy Leader Simon Hughes told Sky News: "The initiative adds to initiatives from previous years saying we need to make sure that people who are wealthier don't get away with it if that's what they're currently doing."
A new coalition drive to hit the rich will also include separate moves to stop high-earning BBC personalities from using tax avoidance schemes and fines for tax-dodging footballers.
The initiatives are likely to play well with Lib Dem activists and come as Deputy Prime Minister and Lib Dem leader Nick Clegg vowed to play hardball with David Cameron over the future of the coalition.
And it comes as Vince Cable indicated he wants a fresh assault on tax havens and non-domiciled millionaires. The Business Secretary told The Sunday Times he wants tough action against "shady" wealthy people who make "systematic and cynical" use of offshore havens such as Monaco and the Cayman Islands.
Meanwhile, Mr Clegg admitted at an opening night conference rally that the Lib Dems had made mistakes during their first two years in coalition.
But he stressed it was only "half-time" in the coalition's term of office and rubbished suggestions he would step down before 2015 by promising to fight for the party's values right up to the general election. "One of the most important ways we can do that is by making taxes fairer," he said.
<strong>Current Job:</strong> Looking for a job <strong>Pro:</strong> Narrowly lost the last leadership race against Clegg <strong>Con:</strong> That is a picture of him arriving at court
<b>Current Job:</b> Appearing on TV to NOT talk about *that* court case. <b>Pro:</b> She is a world class economist and has made no secret of her political ambitions <b>Con:</b> Had a spot of bother with someone driving a tad fast
<strong>Current Job:</strong> Party president and 'differentiator' in chief <strong>Pro:</strong> Makes really good jokes <strong>Con:</strong> A bit of a joke
<strong>Current Job: </strong> Being popular <strong>Pro: </strong>He is popular (with people) <strong>Con:</strong> But he is not popular (with Lib Dem MPs)
Current Job: Energy secretary Pro: Could sneak up through the middle (see: John Major) Con: Who?
<strong>Current Job:</strong> Texting Ed Miliband Pro: Popular with the left of the party and Labour Con: Tory business minister Michael Fallon is under orders to assassinate him if he makes any moves against Clegg
<strong>Current Job: </strong> Turning down jobs Pro: Free of the coalition dirt Con: Missed his chance?
<strong>Current Job:</strong> Trying to break the Lib Dem glass ceiling <strong>Pro: </strong>Would be the party's first female leader <strong>Con: </strong> The Lib Dems strangely do not have a great record on promoting women
<strong>Current Job: </strong> Hanging out with Hugh Grant <strong>Pro: </strong> Lost his seat so is untainted by Tory germs <strong>Con: </strong> The Sun would monster him
<strong>Current Job: </strong> Mr Swinson <strong>Pro: </strong> Up. And. Coming. <strong>Con</strong> Would have to fight his wife for the job