It fears that creating a free market in rural land would prompt peasants to sell their holdings to pay their debts, sending an avalanche of landless farmers to cities that have no social-security infrastructure to deal with them.
From there, in fact, maybe even a greater piece of information is the credit report, because the credit report, obviously, not only gives a Social Security number and personal information about the individual, but it also goes on to indicate where the person has their holdings, whether they have home equity loans, and effectively, they can obtain driver's licenses from that and then they can get open bank accounts.