Also, it's not like tax evaders, and rare animal smugglers, and cocaine dealers are going to want to give a completely honest accounting of their finances.
After a lengthy debate, the Greek parliament has expected to vote later on whether politician should face a criminal investigation from mishandling an inquiry into suspected tax evaders with a Swiss Bank account.
The kind of people earning reportable private contractor income and not filing a return are not the kind of sophisticated tax dodgers that the IRS would like you to believe they are.