Jamie Dimon speaking at the 2017 Delivering Alpha conference in New York on Sept. 12, 2017.

In mid-October 2012, Jamie Dimon, chief executive of JPMorgan Chase, hosted a luncheon on the 49th floor of the firm's Park Avenue headquarters. The guest list was a boldface roll call of corporate executives and policymakers: Lloyd C. Blankfein of Goldman Sachs, David M. Cote of Honeywell, the Democratic senator Mark Warner of Virginia and the Republican senator Lamar Alexander of Tennessee, among others.

The topic over lunch was "Fix the Debt," a nascent effort by like-minded executives — all of whom had signed on to the campaign — to urge lawmakers to address the nation's growing debt. Erskine Bowles, the former chief of staff for President Bill Clinton who was an inspiration for the group along with Alan Simpson, the former Republican senator from Wyoming, had just called the nation's debt "a cancer that will destroy this country from within."