Unemployment is low and inflation is high. Borrowing 25% more than we (The US) takes in in taxes every year makes no sense. Raise taxes or cut spending. Borrowing when there is no recession makes it harder to borrow if there was a recession or war that required it.

There does not seem to be a plan by either party to actually balance the budget. God forbid we actually pay off the debt in good times like a responsible country.

There is only 4 ways to get rid of debt as a country tax more, spend less, grow more, or create inflation so the real value of the debt is lower. We aren't going to grow enough to justify running a 25% deficit year after year. Growth is 2-3% a year. The secret default plan is the country will need to have inflation of 10-25% a year for several years at some point. Warren Buffet has talked about the power of the country to inflate itself out of debt and it doesn't seem like we have another plan.

Clarification: Not raising the debt ceiling does not definitely mean a US default. It means huge cuts, tax increases, or a default. Originally, the Treasury stops payments to what it classifies a least essential government services. It would be bad and would be a crisis. However, we would have some control.