[credit_guy]

I think they address the why:

  “Household balance sheets are now in a materially better state than they were pre-pandemic, as MP3 created a significant amount of wealth, pushing up the value of assets like equities, housing, cryptocurrencies, and so on. These gains have been broad-based across the economy, not just in the top decile or quantile. Ongoing stimulative financial conditions have further lowered debt service costs, and incomes have also benefited as economies have reopened. In short, households are wealthy, flush with cash, and ready to spend—setting the stage for a lasting, self-reinforcing surge in demand.”

[zhdc1]

This is one of the factors for current inflation, but it's not sustainable over the long run. Consumers will happily over-leverage themselves to pre-pandemic debt levels, and we'll be left in the same long term situation as before (bad demographics and too much money chasing investment opportunities).