Consumers Purchasing on Credit The reasons we as Americans buy on credit varies, but without it most of us would probably never be able to purchase necessities such as a home or automobile. The nation's economy depends on credit, the promise to pay later for goods and services used today; but along with consumer credit comes consumer debt. With the rise in telemarketing and commercializing in America it is no wonder why Americans feel the impulse to buy now, pay later. The most common form of consumer debt is installment debt, which is when a consumer borrows the money to purchase an item and agrees to repay the loan in equal installments over a