Although easy access to inexpensive Mexican food would be a boon for hungry Americans, what would the inevitable presence of those trucks do to the American economy? How could our country accommodate an explosion of trucks at that scale?
The first question we must answer is how many trucks we're talking about. A corner is dependent on an intersection of street, a place where two roads meet or where one road turns. For the purposes of our thought experiment, we will assume that Gutierrez didn't mean a truck literally on every corner — that would be ridiculous. Instead, let's assume that he meant a truck at every intersection.
...
That would give us about 3.2 million intersections in the United States. And it would mean that, per Gutierrez's vision of the future, we'd suddenly see 3.2 million conveniently located taco trucks. How ubiquitous is that? Well, it's one on every corner. But we can also compare it to Starbucks, which seems pretty ubiquitous in a lot of places. In 2012, there were about 11,000 Starbucks locations in the United States.
...
So what would it mean to have 3.2 million such establishments on our streets? Well, according to this article at something called "FoodBeast," there are already 3 million food trucks in America, so apparently we wouldn't really notice them. Unless that figure is wrong, as this article effectively argues. For example: "According to TruckInfo there are about 15 million trucks on the road in the U.S. This means 1 in 5 trucks on the road are food trucks." Which seems high.
...
But it's where we're headed, apparently, if Trump loses. That's good news for the economy in one way. If you assume that three people work in each truck, that's 9.6 million new jobs created. The labor force in August was 159.4 million, with 144.6 million employed. Adding 9.6 million taco truck workers would help America reach nearly full employment — and that's just the staffing in the trucks. Think about all of the ancillary job creation: mechanics, gas station workers, Mexican food truck management executives. We'd likely need to increase immigration levels just to meet the demand.
...
https://www.washingtonpost.com/news/the-fix/wp/2016/09/02/the-national-economic-implications-of-a-taco-truck-on-every-corner/