I believe the balanced budget amendment has an exemption clause for war of something of that sort. Default wouldn't allow for that.
We are are war, and have been for the past 10 years.
I think you missed my point or perhaps I need to be clearer. The proposed balanced budget amendment allows for deficit spending via the overseas contingency fund. If we defaulted on our obligations, the Treasury, President, or whoever would have to prioritize payments.
You said that the amendment would require the budget to be "constantly balanced". That isn't true when it allows for deficit spending for wars. Defaulting does not.
As such, the two are not exactly the same thing. Just pointing that out.