For the first time in history, interest payments on non-mort...

For the first time in history, interest payments on non-mortgage debt in the US are equivalent to interest on mortgage debt, at $575 billion.
Exactly 3 years ago, interest on non-mortgage debt was at $250 billion.
This marks a 130% increase in household interest expense on non-mortgage items over just 3 years.
Furthermore, 3 years ago interest on non-mortgage debt was HALF of interest on mortgage debt.
Americans are "fighting" inflation with high interest rate debt.
How is this sustainable?