Jeremy Hunt
Former Conservative ministers say it shows the new government is wrong to say they left the country in a mess.
The ITV presenter even suggested someone else must have asked Hunt to make such expensive commitments.
The Conservatives "should never be able to have power on our public finances again," Reeves said.
The senior Tory faces a major battle to hold onto his seat.
The chancellor was secretly recorded at an election campaign meeting.
The Today programme presenter gave the chancellor a brief political history lesson.
The chancellor challenged Charlie Stayt's claim that the mini-budget had caused higher interest rates.
The multi-millionaire chancellor was grilled on the Today programme as inflation fell once again.
The International Monetary Fund has warned the chancellor not to bring down National Insurance again before the election.
The chancellor's attack on Labour backfired spectacularly.
About Jeremy Hunt
According to his website: "In December 2005 he was appointed Shadow Minister for Disabled People, where he successfully campaigned for the BBC to increase the amount of subtitling on its programmes. He also campaigned strongly for simplification of the benefits system for disabled people and individual social care budgets. In July 2007 he was appointed to the Shadow Cabinet as Shadow Secretary of State for Culture Media and Sport where he has campaigned for more philanthropy for the arts, local TV, superfast broadband, a schools Olympics and a strengthened domestic tourism industry. "In May 2010 Jeremy was appointed Secretary of State for Culture, Olympics, Media and Sport in the new Conservative - Liberal Democrat coalition. In September 2012 he was appointed Secretary of State for Health in the Prime Minister's Cabinet reshuffle. "Jeremy divides his time between Westminster and his constituency home in Farnham. He married his wife Lucia in July 2009 and they have a son and a daughter."