I am not defending Carney but this is an out of context quote. He did not say that cutting spending was irresponsible, he said that not reading the debt limit so that the US could pay its bills is irresponsible. Carney did not answer the question. He changed the subject.
The truth is that the left is simply not serious about cutting spending or reigning in the debt. The reason is that they simply do not think that the debt is important.