Sanctuary policies promote the Undergound economy. It's a type of disparate impact----where law abiding US citizens have to obey business regulation and taxation policies---and illegals working under the table do not. This is a gross slap in the face to businesses that have to meet innumerable regulations.

The underground economy has burgeoned---as illegal immigration has soared too. In 2000 the IRS reported a tax gap (uncollected revenue) of $280 billion, which by this year had increased to $500 billion. This is a terrible tragedy in which tax paying US citizens are not only getting burdened with the impact of illegal immigrants, but they are making up the revenue shortfalls from them as well. And liberal governments with their sanctuary policies are tacitly condoning this.