Essential businesses are largely limited to health care providers, grocery stores, take out food vendors, delivery drivers, lawyers, doctors, media, car repair, gas stations, and in some states gun shops.
Most responsible businesses have workers working remotely if they can.
In 911 the heroes were fire fighters.
In Covid-19 the heroes are grocery stores clerks and hospital workers. They are getting paid minimum wage to be on the front line of exposure. The grocery store clerks are making minimum wage.