There's also a huge incentive for businesses to keep low paying workers in the country. It's probably not for the kind of their hearts that they keep illegal immigrants in the country.
Every restaurant/pub kitchen in the US is basically manned by someone from another country. Maybe some of those are paid a bit less than what they should be paid.
With minimum wages going up, and additional expenses like Mediclaim piling up on the employers, some of the businesses resort to employ illegal immigrants hoping that doing so will keep them afloat at least on a temporary basis. And they also know that there will be no legal repercussions for doing so. Most of the cities in the United States are ruled by Democrats and they turn a blind eye to different businesses employing illegal immigrants. But I am not sure how this will benefit the country in the long run.