People could work an average of 1,800-2,000 hours per year until they reach their 50’s, taper off to 1,300-1,500 hours in their early 60’s, and move toward the 500-1,000 range as they approach 70. A hospital nurse, an airplane crew member, or a secondary-school teacher, for example, could work five days a week until her late fifties, four days a week until age 62, three days until age 65, and perhaps two days until age 70.
第二个原则是退休应该是一个渐进的过程。在50岁之前，人们每年平均可以工作1800—2000小时，60岁出头时可以降低到每年1300—1500小时，在70岁时再降低到每年500—1000小时。比如，医院护士、飞机空乘和初中教师可以每周五天工作到近60岁，每周四天工作到62岁，每周三天工作到65岁，然后每周两天工作到70岁。