Gaius
2
Here is a “zoomed-in” look at the last 10 years of that chart.
As you can see the difference between GDP and GDI has grown quite large, (and they are supposed to be equal.)
The econ nerds I sometimes hang out with think it has something to do with people spending out of savings and spending out of money market accounts (instead of spending out of income earned from work, from investments etc.), but no one seems to know for sure why they are suddenly so different.