Anytime there is money, there is always an extensive paper trail. Enforcing financial laws is possible to do if you apply the requisite resources. Unfortunately, we don't do that in this country.
But at the end of the day, if a financial product is so complicated that it can't be regulated, that's a good sign that it never should have been created in the first place.
But at the end of the day, if a financial product is so complicated that it can't be regulated, that's a good sign that it never should have been created in the first place.