Social Security is now expected to run short of cash by 2033

The Social Security program is expected to run short of cash to pay promised benefits in about ten years, while a key trust fund for Medicare will run out of funds by 2031, according to new forecasts issued Friday by trustees of both programs.

The projections serve as an annual reminder that the popular programs rest on shaky financial footings. While any effort to patch them is sure to face stiff political opposition, doing nothing is likely to be worse.

Social Security benefits for retirees and others are primarily paid...