I ask because we had a situation in Ireland just like this many years ago. It was for welfare fraud specifically and faced criticism for a few reasons. One was that the suspected levels of fraud may have been much lower than the politician was claiming. The other reason was that the cost of tackling it could likely outweigh any savings.
I would say there is two things at play here one is that you should have is simplifying the compliance requirements to make fraud easier to detect. Like for example in the US for disability if you have more than 2k in your bank account you lose disability.
All these requirements were created to show that a government will offer welfare when they really don’t want to. If we just said if you make less than X you get help. It would be simple math and a SQL query to check for fraud. At the same time having a fraud team in that looks at businesses doing the fraud would be better served like with the US Medicaid fraud that dwarfs any fraud coming from individuals.