> The type of tax fraud that requires money laundering is drugs. even white collar crime would face the problem of explaining where the money for purchases cam

> The type of tax fraud that requires money laundering is drugs. even white collar crime would face the problem of explaining where the money for purchases came from if that income hasn't been declared. money laundering is part of the strategy for anyone who does crimes and wishes to not get caught (otherwise why give up part of the profit for the laundromat).