It's a fantastic metric to compare aggregate debt to. It isn't the end of the story, which is why I also cited debt payments to disposable income.
American households are not, in aggregate, in a painful or even deteriorating position with respect to their debt. That doesn't mean many households, or even entire regions, e.g. West [1], aren't in pain.
[1] https://usafacts.org/articles/the-state-of-household-debt-in...
The US has free healthcare for the bottom ~25%, including the poor. If you are in the low income working group, you're often largely out of luck. Those are the people suffering the most. They often don't qualify for EBT cards, they don't qualify for free healthcare, they don't qualify for housing subsidies, and so on.
“Free healthcare” in the form of Medicaid is a bit generous of a description for people under 65 and over 18. Few providers take it, and the benefits are really bad in many places.
So the metric to measure “working class burden” (or whatever) is the percent increase in consumer, non-housing debt for people who had debt.
Well off people who went from $0 credit card debt to $0 while having their networth double since 2020 (high gdp) are not very useful to predict bankruptcy or political upheaval like people who went from $5k to $40k in credit card debt, are renting so didn’t see their networth go up and had their wages increase 5-10%. Those people are having a really rough time. And are worse off now day to day, and have increased exposure to risky negative events.
Household debt to GDP is around at a multi-decade low [1]. Payments as a fraction of disposable income, similarly low [2]. Total debt is rising [3]. But non-housing debt rose 5.8% from Q2 2022 to the same quarter '23; that's about inflation.
[1] https://fred.stlouisfed.org/series/HDTGPDUSQ163N
[2] https://fred.stlouisfed.org/series/TDSP
[3] https://www.newyorkfed.org/microeconomics/hhdc