The reasons vary: Potential workers may be unvaccinated and some working parents continue to face a lack of child care or in-person schooling for their children. Restaurant workers may be hesitant to return to the front line and risk getting Covid-19. Others may have moved out of the area or found a new way to make money. Then there is the extra $300 weekly unemployment insurance, which may also hold people back from taking a job, owners have said. Those explanations are among the ones Matt Glassman, co-owner of The Greyhound Bar & Grill in Los Angeles, heard from former employees who decided not to return when he reopened this week. His two locations have been closed since last June, after Glassman and co-owner Steven Williams contracted Covid and decided it wasn't worth the risk to reopen until vaccines were readily available.