A cultural scene as vast and diverse (and expensive) as New York’s could not survive without major benefactors, or without benefactors who are proficient at attracting other benefactors. And in a city where figures like $1 billion are thrown around as fundraising targets without anyone so much as batting an eyelash, the generosity and fundraising talent of such philanthropists are in high demand. The cultural “power couple of the moment” in the Big Apple consists of Jerry Speyer and Katherine Farley, who between them hold the key to many of Manhattan’s most ambitious cultural projects.