In a free market, companies should be allowed to decide whether or not to offer paid sick leave to employees. At the margin, employees who value paid sick leave will flow to companies that offer it and employees that don’t won’t; also at the margin, companies that offer paid sick leave will be able to pay their employees a little less in other forms of compensation. Everything works out for the best.

Unfortunately, not offering paid sick leave creates a classic externality: People go to work even when they’re sick, infecting their co-workers (or customers); employers internalize some of that cost (co-workers), but not all of it (co-workers going home and infecting their kids, who then go to school — because their parents can’t stay home to take care of them — and infect their classmates, etc.). I’ve written before that we are far behind the rest of the developed world in requiring paid sick leave.