`We just can't afford it!'' Not long ago, every America child heard that, at one time or another, in the home in which he or she was raised. ``We just can't afford it!'' It may have been a new car, or two weeks at the beach, or the new flat-panel TV screen. Every family knew there were times you had to do without. Every father and mother has had to disappoint their kids with those words. Why is it that what parents do many times a year politicians seem incapable of doing: saying no. How many times in the last...