Answer:
Step-by-step explanation:
Entitlements.
The government increased its obligation to students, to homeowners, to those on social security, to Medicade and Medicare, to all sorts of programs that needed money.
War
Wars were increasingly becoming more expensive. In 2010 the United States was supposed to have paid off the Vietnam war. I think they did achieve that, but they fought some wars in between. Iraq (twice) Afghanistan, These wars were not cheap. The debt grew. The only recent prsident who tried to do anything about was Clinton.