If we want universal insurance and unlimited patient and doctor choice, costs will continually spiral upward, because there will be no reason or no one to stop them. We have a variant of that today - a cost - plus system, with widespread insurance and open - ended reimbursement (偿还). Higher costs push up premiums (保险费) and taxes. That’s one reason health spending has gone from 5 percent of gross domestic product in 1960 to 16 percent in 2007. But controlling spending requires limits on patients and doctors. Health spending has increased since 1960 partly because.
A. costs of health - care are becoming higher. B. insurance companies are making more profits. C. the government is giving less financial support. D. there is no limit on patient and doctor choice.