We&rsquo;re frugal! We pay our debts! Not attributes you usually associate with San Francisco, we know. But apparently it&rsquo;s true: Our fair city has the fifth-best credit score in the land, according to a report from credit powerhouse Experian. Our score of 781 can&rsquo;t match Wausau, Wis. whose residents led the nation with a score [...]