Sarcasm attempt? Nobody "made" banks to give sub primes to anyone. It was all part of the "Light Touch" deregulation fiasco, a repeat of the junk bonds meltdown during the RayGun / Lyin Brian depression.
https://books.google.ca/books?id=c7sUDAAAQBAJ&pg=PA173&lpg=PA173&dq=subprime+light+touch&source=bl&ots=aA55z44wLD&sig=FNcnxrC4ybrBBKPaC4Ad-Eadvhw&hl=en&sa=X&ved=0ahUKEwjagazP5djRAhUN0mMKHfpLCUsQ6AEIJzAD#v=onepage&q=subprime%20light%20touch&f=false