That's weird... coincidentally, 7 points is also roughly the difference between the 2% rate we're typically told is "inflation" and the actual rate of monetary expansion. 🤔
The United States Congressional Budget Office has published an annual projection of future US national debt every year since 1984. They also sometimes review how accurate past projections were. Unsurprisingly, they typically underestimate the debt by 7%.
https://www.cbo.gov/publication/55234
Discussion
Damn those coincidences!