From Government Executive:
...  In Australia, the government set off on a radical plan to reduce 
overpayment of government benefits in 2016. ...
The
 Australian government had been manually searching for overpayments in 
programs for retirees, people with disabilities and students, among 
others. The 2016 program used algorithms to search out overpayments and 
send the bills. Christened “Robodebt,” the algorithm checked each 
individual’s payment against the average income of people in similar 
circumstances. If the algorithm determined that the person was likely 
overpaid by the government, it generated a bill.
Robodebt allowed the government to review 20,000 cases per week, 
instead of the 20,000 cases per year in the manual system it replaced. 
Government officials no longer had to contact employers to obtain data 
on employment history and payroll amounts, and the government no longer 
had to prove an individual had been overpaid. Instead, individuals had 
to prove that they had received the correct amount. If individuals 
didn’t pay quickly, debt collectors went to work.
The 
government launched Robodebt fast and claimed credit for catching 
recipients who had benefited from mistakes in the system. But many 
people receiving the notices were distraught.
 They often had to come up with big payments in just a few weeks. Some 
people had to sell their cars or take out loans, which was a huge burden
 on some of the country’s neediest residents. Others drained their 
meager savings. At least three people committed suicide, a Royal 
Commission found in a devastating 1,000-page report. 
An investigation revealed that some repayment notices were incorrect.
 Some simply were false. Moreover, a 2019 court challenge found that 
Robodebt had violated important provisions of Australian law.
In
 July 2023, the Royal Commission pointed to “Robodebt’s unfairness, 
probable illegality, and cruelty.” When problems surfaced along the way,
 the commission concluded, “the path taken was to double down, to go on 
the attack in the media against those who complained and to maintain the
 falsehood that in fact the system had not changed at all” from the 
previous system. ...
    Could this happen here? To a great extent, it already is happening. Republicans, abetted by Social Security's Office of Inspector General, have long implied that all overpayments are the result of fraud and that the agency must be merciless in collecting these debts. Recently they have been blaming the agency for not creating overpayments automatically based upon data from payroll companies. Already, there is no statute of limitations, those informed of alleged overpayments are given no information about how the alleged overpayments occurred, and all benefit payments are seized until the desperate claimant asks for a repayment schedule. It's harsh by design despite the fact that the agency often has no basis in fact for asserting an overpayment and many overpayments are due to mistakes made by Social Security. The current attitude is that if the computer says there's an overpayment, there must be an overpayment. It could all get worse with artificial intelligence.