What was the major financial change between post-world war 2 borrowers and borrowers after 1970?

After the World War 2, the economy of the country was growing because of the Industrial Revolution. Borrowers were confident that they could pay their debts and banks allowed big loans. During the 1970's, it was the time of the Great Depression. There were a lot of people who needed money but hundreds of banks closed and it was difficult to find a stable and good paying job that would allow the banks to approve big loans.