Topeka, Kan. and Washington - At its best, America's infrastructure has powered our economic prosperity, created well-paying jobs, and served the public interest. Today, however, it has fallen into a dangerous state of disrepair. The Minnesota bridge collapse last summer brought home the urgency of repairing and modernizing our nation's system of highways, bridges, tunnels, power plants, transmission lines, and airports. But doing so will be prohibitively expensive. Current plans seek to exploit the nation's need for private profit. But there's a better source of capital at hand: public pension funds. The American Society of Civil Engineers estimates that $1.6...