Why would General Motors Corp. be willing to accept such a small amount today ($25,000) in exchange for a promise to repay four times that amount ($100,000) in 30 years? What is this a reflection of?

Why would General Motors Corp. be willing to accept such a small amount today ($25,000) in exchange for a promise to repay four times that amount ($100,000) in 30 years? What is this a reflection of?