~~Social security"" ought to apply to machines • Now, when a man reaches the proper age for retirement, social security makes it possible. There used to be a retirement plan for machines, too-depreciation reserves. But machines cost so much more now than when they were bought, that there isn't enough money in the deprecia tion account to replace them. So too-old machines are kept at work, producing less for worker, owner and national defense than new machines could do. G...