Daniel Loeb, Paul Singer and dozens of other hedge-fund managers have poured millions of dollars into promoting charter schools in New York City and into groups that want to revamp pension plans for government workers, including teachers, the Wall Street Journal reported today. The leader of the American Federation of Teachers, Randi Weingarten, sees some of the proposals, in particular the pension issue, as an attack on teachers. She also has influence over more than $1 trillion in public-teacher pension plans, many of which traditionally invest in hedge funds. Her union federation is funding a lobbying campaign to eliminate the “carried-interest” tax rate on investment income earned by many money managers. It is trying to defeat legislation that would increase the charitable deduction in New York state for donations to private schools. And it has filed a class-action lawsuit accusing 25 Wall Street firms of violating antitrust law and manipulating Treasury bond prices.