How could some American legislators opposed to raising the debt ceiling, vote to increase the nation's deficit by $900 billion over 2 years?

Little by little, business is enlarged with easy money.

With the exhaustless reservoir
of the Government of the United States furnishing easy money,
the sales increase, the businesses enlarge, more new enterprises are started,
the spirit of optimism pervades the community.

Everyone is making money, everyone is growing rich.

It goes up and up…until finally someone whose judgment was bad,
someone whose capacity for business was small, breaks,
 and as he falls he hits the next brick in the row, and then another
… and down comes the whole structure.

That is what happened to greater or less degree
before the panic of 1837, of 1857, of 1873, of 1893 and of 1907.

Elihu Root
US Senator, Nobel Laureate