Debt is not a component of aggregate demand

Wikipedia's Aggregate demand article, under Debt, says

A post-Keynesian theory of aggregate demand emphasizes the role of debt, which it considers a fundamental component of aggregate demand;

I wish they wouldn't say it that way. Debt is not a "component" of aggregate demand. The rest of the sentence is better:

the contribution of change in debt to aggregate demand is referred to by some as the credit impulse. 

This part of the sentence refers to the change in debt. That's correct. An addition to debt is a measure of "extra spending" created by new use of credit. A reduction in debt would imply money being returned to the lender, and a reduction of spending. 

The sentence that comes next shows why it is incorrect to emphasize "the role of debt" in aggregate demand:

Aggregate demand is spending, be it on consumption, investment, or other categories.

Aggregate demand is spending. You can't spend debt, so debt cannot be a component of aggregate demand. 

Debt is what remains after you borrow money and spend it. Or as I prefer to say it, debt is what remains after you use credit.