PowerPivot helps you understand the US Debt

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Whether you subscribe to the Hamiltonian theory of the need to run a deficit to have an effective government or not, there's an interesting set of data about the US National Debt which you can look at with Excel Power Pivot:

https://understandingtheusdebt.com/

https://understandingtheusdebt.com/technology.aspx

Ideally you would run a power pivot display connected to a dataset this large from a SharePoint server, but it is usable from Excel.