Liability protection for employers in a post-pandemic world

The Washington Post has a piece on the split between GOP and Dem leadership in the US Senate over a proposed blanket immunity for employers whose employees become infected with the novel coronavirus. I am sure Dallas isn't alone in having restaurants (and other businesses?) whose owners are prohibiting the wearing of protective masks by their employees. Are they counting on the exclusive remedy under workers' comp to protect them from civil liability? I wouldn't.