The US is reaching debt limits because of a specific resource limit – lack of inexpensive oil, Tverberg writes.
If an economy is growing, it is easy to add debt. The additional growth in future years provides money both to pay back the debt and to cover the additional interest. Promotions are common and layoffs are few, so a debt such as a mortgage can easily be repaid.
The situation is fairly different if the economy is contracting. It is hard to find sufficient money for repaying the debt itself, not to mention the additional interest. Layoffs and business closings make repaying loans much more difficult.
If an economy is in a steady state, with no growth, debt still causes a problem. While there is theoretically enough money to repay the debt, interest costs are a drag on the economy. Interest payments tend to move money from debtors (who tend to be less wealthy) to creditors (who tend to be more wealthy). If the economy is growing, growth provides at least some additional funds offset to this loss of funds to debtors. Without growth, interest payments (or fees instead of interest) are a drain on debtors. Changing from interest payments to fees does not materially affect the outcome.
Recently, the growth of most types of US debt has stalled (Figure 3). The major exception is governmental debt, which is still growing rapidly. The purpose of sequestration is to slightly slow this growth in US debt.
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