I was reading economic drivel yesterday that indicated high debt-to-GDP could be making interest payments out of worker productivity increases, which would expl

I was reading economic drivel yesterday that indicated high debt-to-GDP could be making interest payments out of worker productivity increases, which would explain flat buying power (non)growth. It's still unclear to me how running a huge deficit is not a problem. It doesn't matter, but... how? The natural inclination is that it does.