There are a lot of people who claim entrepreneurs are essential to economic growth. There is some merit to that claim. Sam Walton, after all, started Walmart from nothing, Henry Ford helped launch the automotive industry and Edison bought us electric lights on a massive scale. Those entrepreneurs were able to see needs and meet them.
There are some efforts in various states and locations that exist to help entrepreneurs get the space, funding and equipment they need to turn their ideas into companies that employ thousands of people. Business incubators attached to colleges, for example, are built for that very purpose.