WASHINGTON — THE national transplant list just passed a morbid milestone: More than 100,000 people now wait for kidneys.

We are at this point largely because even though demand is growing, donations from living and deceased donors have remained flat, between 16,500 and 17,000 annually, for the past decade. Between now and this time tomorrow, 14 people will die, many after languishing on dialysis for 5 to 10 years, while their names slowly crawled up the queue.

The problem lies in the requirement that all organs be given altruistically (as a friend did for me in donating her right kidney eight years ago). Federal law is widely interpreted as forbidding donors to receive anything of tangible value in return for their lifesaving deeds.

We can’t solve the issue merely by getting more people to sign organ donor cards — though everyone should — or even by moving to an opt-out system, under which we would harvest people’s organs at death unless they had earlier indicated they didn’t wish to donate them. These solutions can do only so much, because relatively few people die in ways that leave their organs suitable for transplantation.