This bill isn't working so well because overseas banks are not cooperating (a state of affairs that was certainly expected). Thus, there is a need for something else: Senate Bill 1813, recently introduced by Senator Barbara Boxer (D-CA). This bill, in part, states that taxpayers with unpaid taxes over US$50,000 may find their passports confiscated.
This isn't criminal per se, but the IRS has recently made noises about "sharing" information with police authorities. The last time it was an institutionalized crime to owe money within the context of the Anglosphere was during the British industrial revolution when there were such things as debtors prisons.