Toward the end of Monday’s meetings on fiscal responsibility at the White House, Senator Kent Conrad stood up and produced a little bolt of honesty. “Revenue is the thing almost nobody wants to talk about,” said Mr. Conrad, the chairman of the Senate Budget Committee. “But I think if we’re going to be honest with each other, we’ve got to recognize that is part of a solution as well.”

Mr. Conrad’s frankness was delivered in the cryptic language of budget experts, and many people might have missed the point. So allow me to translate:

Your taxes are going up.

They will probably go up in the coming decade, and the increase will be permanent. For a half-century, federal taxes have remained fairly constant relative to the size of the American economy  equal to about 18 percent of gross domestic product. But the 18 percent era has to end soon.

It won’t end because President Obama is some radical tax and spender, either. It will end because of a basic economic reality.

Americans have made it clear that they want a certain kind of government, one that can field a strong military and also maintain popular programs like Medicare. Yet we are not paying nearly enough taxes to maintain those programs. Even major changes to the health care system  the single most important step for closing the budget gap  will not close it entirely. Taxes must rise, too.