Space-based money barrel detectors. Anyone rich knows that laundering money is a purchase and sale away: art, jewelry, plane, barge, etc. As long as there are

Space-based money barrel detectors. Anyone rich knows that laundering money is a purchase and sale away: art, jewelry, plane, barge, etc. As long as there are one or more parties disincentivized or unconcerned with participating in taxation, people will find ways to avoid handing over large sums of cash and "let the little people pay taxes." (Yup, that's how some view it.) How about a large finders % fee for reporting cheats? Or would NARCing render it moot by social and business pressures?