We need a nonprofit NGO that does tax investigation, if that were possible.
We have a problem though. The entity responsible for investigating these things is the IRS. The IRS is controlled by our politicians, and they are keeping it under-funded. Thus, the IRS does not have the resources to investigate if it has been defrauded, for as long as they can protect themselves from it.
So, one solution would be an investigative entity whose funding they cannot touch. One run and funded by donations.