It will probably take a 5-7 years and you will probably experience retaliation (spoiler alert: retaliation illegal and another lawsuit in itself).
If you know for a fact that your employer attained PPP funds from the SBA and didn't tell the whole truth on their application (most didn't)… Like say… How many employees they had on payroll.
Uncle Sam wants his money back. The PPP payouts and status are public information. You could file anonymously through the SBA's website but, I don't know why you would give up life changing reward money. The reward is 15-35% of the recovered money. The recovery is 3x the distribution. The government recovers it's money 95% of the time.
Whistle Blower / Qui Tam / False Claims Attorneys will work on Contingency, meaning they don't get paid until the case is won. They aren't easy to find and they may expect 30-40% of the pay out but, I'm certain the reward for most of us, is still more than we would be paid if we just kept our head down and our jobs like good little worker bees for just as much time.
The only catch is, you need to be the first to report the fraud and understandably, nobody likes a litigious employee. Fuckem.