There are plenty such people, not only billionaires. Shop owners tired of taxes and regulations, parents sick of failing schools and concerned about public safety and constantly rising taxes and fees. Even on social issues like abortion and same-sex marriage, New York can only be better off with a healthy debate over policies and philosophies.
Louis's last point is the most dubious one, since the healthiness of the debates we hear on those "social issues" elsewhere is open to question. Overall, he seems to believe in an essential bipolarchy opposing advocates of an ever-expanding government against those always pushing back. His implicit argument is that any real opposition to Democrats must take an anti-"big government" form. This caricatures both the Democrats and the nature of American politics.
A big part of our problem nationwide is a tendency to reduce all questionable policies and programs to a generic "big government" essence, and to assume that to change or end any problematic policy you must oppose the entirety of "big government." Bipolarchy encourages such either/or thinking and blinds both sides to the particular merits or flaws of any given program. Just as Republicans tend to oppose everything that smacks of "big government," Democrats offer a blanket defense of the entire system on the assumption that any brick removed from the edifice will let the laissez-faire barbarians in to run amok. Wouldn't New York City be better off if an opposition party raised concerns about failing schools or public safety without automatically railing against every tax or regulation? Or if an opposition party did argue for a systematic review of taxes and regulations but took the liberal (or libertarian) side on social issues? The reflexive assumption that 21st century Republicanism is an essential and necessary element in American politics is a dangerous one, not because Republicanism itself is dangerous but because the assumption indicates a catastrophic conceptual bankruptcy. To believe that political debate in the U.S. must always take Republican-vs-Democrat or "big government"-vs-"limited government" form is to believe that Oceania has always been at war with Eurasia. Whoever believes it has been brainwashed, not necessarily by a malevolent power but by an unregulated rush of messages and attitudes that threatens to drown out all alternative voices and ideas. There's still time for New York to take another path, and there may be no better time to do it than now.