My assertion is that it's not calculable. It is in the abstract, but are we going to look at the 90-day bond that's released, the 10-year bond that's released, the 30-year bond, or the 50-year bond? Which one will be used? When governments go to the market to raise money, they do not tag that debt to a specific expenditure. It's used to cover government expenditures over time. In principle, I completely understand what you're saying. There is a cost to servicing debt, but it's not a calculation that can be made in respect to an individual dollar that is spent or invested.
On September 29th, 2016. See this statement in context.