"The economy, he contended, bears the cost of illegal aliens, who pay no taxes but receive taxpayer-funded services."
How come they don't pay taxes?
The ones that work normal jobs and aren't paid under the table do pay taxes.
The ones that get paid under the table illegally don't pay taxes.
They ones that get paid as contract workers are responsible for paying the taxes themselves, in that case the employer doesn't withhold taxes, so it's doubtful the taxes are being paid.