It might be counterintuitive to run an enterprise that is wholly dependent on clients who aren’t long for this world, but companies in the hospice business can expect some of the biggest returns for the least amount of effort of any sector in American health care. Medicare pays providers a set rate per patient per day, regardless of how much help they deliver. Since most hospice care takes place at home and nurses aren’t required to visit more than twice a month, it’s not difficult to keep overhead low and to outsource the bulk of the labor to unpaid family members — assuming that willing family members are at hand.