Federal taxes are in large part paid through income withholdings by employers. The employer is trusted to withhold the right amount from employee wages and turn that sum over the IRS.
In Boston, a longtime owner of the city’s largest taxi company hadn’t been doing this. Coupled with the tax issue were other employment law lapses. The company hired drivers who were in the U.S. without proper documentation and never paid overtime when employees worked more than 40 hours in a week.