Forbes magazine, located a couple of miles from Wall Street, hatched an idea for an article on the Scam Capital of the United States. That’s a fun angle and easy on the travel budget, since the magazine is situated in Scam Central. There’s Bernie Madoff, the investment banks that spun mortgage-backed securities into a worldwide financial meltdown and humongous government bailouts, the ratings agencies that stamped this mess with AAA seals of approval and the asleep-at-the-wheel Securities and Exchange Commission. To offer a sweep of recent history, there’s the cast of characters in such books as “Den of Thieves” and “Liar’s Poker.” But, no.