The glass ceiling
American lawmakers are too busy debating whether to raise the debt ceiling to realise they should end it altogether.
On the side of a Manhattan building near Times Square, the National Debt Clock ticks ever higher. Seymour Durst, a developer, set up the display in 1989 to draw attention to what he saw as the nation's debt problem. But the number's smooth climb has made it easy to forget. The clock now ticks above $31trn, a leap f…