James Capretta offers National Review Online readers some guidelines for the process of replacing the Affordable Care Act.

Republicans have their best opportunity in a generation to enact a reform plan for health care that moves decisively toward a market-based approach, with far less reliance on federal regulation and control. A reform plan of this kind would represent a dramatic break from decades of policymaking and would be a major component of an effort to rein in the sprawling federal welfare state.

To succeed in this effort, however, House and Senate Republicans, as well as the incoming Trump administration, must dispense with wishful thinking. There is no plan for replacing the Affordable Care Act (ACA) that is without political controversy. Whatever they do will involve trade-offs, and in some cases they will be attacked by their political opponents for doing what is necessary but perhaps unpopular.

Further, there is no silver bullet for reforming health care that will solve all the existing problems. Health-care policy is complicated and does not lend itself to simple solutions. What’s needed most of all is the discipline of a well-functioning marketplace. Getting there will require many changes, in public insurance, employer plans, Health Savings Accounts (HSAs), and the individual insurance market. While Medicare changes can be addressed separately from other reforms, it will not be possible to replace the main provisions of the ACA in incremental, piecemeal bills, as has been suggested by some in Congress. An effective ACA replacement plan will need to ensure that changes in Medicaid, the individual insurance market, and employer-sponsored plans work well together to provide insurance options for the entire non-elderly population. That will happen only if these changes are made in one coherent reform plan so that interactions among various provisions can be understood and anticipated.

Republicans must also drop their ambivalence about embracing the goal of providing a ready and reliable pathway to insurance for all Americans. It should be self-evident, and not at all controversial to acknowledge, that health insurance is a necessity of modern life. Only the very affluent can afford to pay the cost of treating many forms of cancer without health insurance, and no one is immune from cancer, or a costly accident for that matter. Moreover, households with low incomes will never be able to pay the premiums for health insurance without governmental assistance.

The GOP must accept these realities and address them head-on in a replacement plan.