Lets just use a million as a ball park figure. They are all coming here to work, right? But there are only a few restaurants out there that would take a chance of hiring illegals to work in the kitchen. Latinos generally work in kitchen prepping/cleaning/dishes. But for most restaurants, they have to keep it legal. Odds are that only restaurants in LA/NY {at least} can get away with letting illegals wash dishes/prep food.
Then you also have landscaping/construction. Even with those employers, there are only so many positions that dont require any ID, right?
Many aren't looking for jobs. Many qualify for government subsidies to the tune of 1.2 billion per years as of 2017.
That figure will double every two years at the current rate of border crossings.
Mark my word, pensions are about to start failing nationwide VERY soon. Someone's got to pay for all these illegals and pension pools are an easy target (especially since in most Democrat areas, they are unfunded to begin with). Detroit will go first. Then NewYork.