How much money is being lost to government fraud?

According to Andy McCarthy, a former federal prosecutor, the federal government is losing enormous sums to fraud. McCarthy indicates that hundreds of billions of dollars are being lost, particularly in the post-Covid era. While the exact figures mentioned in this clip are hundreds of billions, the description notes that annual losses range between $233 billion and $521 billion due to fraudulent activities. These are not trivial amounts but represent substantial taxpayer money being mismanaged.