a National Debt is the amount of money obtained by one country from another that has not been paid. This can effect a country by means of loss of land actually owned, or it can cause agencies (e.g. Social Security Administration) to be cut on their budget. Meaning the agency to be cut of operational funding will loose a certain amount of funding until funds are found. Normally multiple agencies are cut to obtain some of the money to pay back the debt but this can really hurt agencies for reasoning of staffing as well as other operational costs. Hope this helps!