Is this what you are talking about?
Federal SNAP spending related to the final rule stands to be reduced about $109 million in fiscal year 2020 and $5.48 billion over the five years from 2020 to 2024, the USDA reported.
If so, that isn't saying there is $5.48 billion of fraud in the system to be removed. That is just saying we are changing the rules so people that are legitimately eligible now won't be legitimately eligible afterward and that will save us $5.48 billion over five years. Again most of these folks are homeless, legitimately disabled, have medical problems or have other serious problems that prevent them from working 20 hours a week. Otherwise, they wouldn't have qualified for the work wavier in the first place. It is just punishment plain and simple.
And the good news from your article is: “FMI has heard that several groups are considering suing the agency [USDA] in opposition to the rule. If suits are filed, it is likely plaintiffs will seek injunctions preventing the implementation of the rule pending the ongoing litigation.”