Treasury Sec. Janet Yellen
U.S. Treasury Secretary Janet Yellen speaks during a news conference at the IMF and World Bank Annual Meetings at IMF headquarters, October 14, 2022 in Washington, DC.
  • A US debt default would be a disaster for the economy, Treasury Secretary Janet Yellen said. 
  • She warned of potential mass unemployment, payment failures, and broad economic weakness if the US failed to pay its debts. 
  • She urged lawmakers to raise the debt ceiling and not wait "until the last minute" to do so.

A government debt default would be catastrophic for the US economy, sparking mass unemployment, payment failures, and interest rates rising "into perpetuity," according to US Treasury Secretary Janet Yellen.