A friend of mine who runs a big finance-related firm here in New York City is scouting for new digs in Miami — not only for office space but also a house — and it’s not just about the taxes.  This fella, who spoke on the condition of anonymity, is a name-brand financial type. He’ll make headlines if he decides to bolt. He employs plenty of people — from highly compensated executives to middle-class support staff. They all pay their taxes in addition to their mortgages and grocery bills. They