Interest on the debt was $230B in 2014, is $375B now and will be $500B in 2025.

The increase in interest increases the deficit which increases the debt. There is no magic sustainable deficit percentage. We should be paying down the debt when times are good to prepare for times that aren't.

My point is that the interest payments on the debt are becoming crippling and this crippling effect will increase on a logarithmic scale over time.