NYC Success Academy (charter school) founder Eva Moskowitz demands more public school classroom space, yet a review of public records by the UFT indicates hundreds of seats at her schools remain empty every year as kids leave or are pushed out, and are not replaced. Even as those seats go unfilled now, Moskowitz, and the hedge fund-backed Families for Excellent Schools called on the mayor to double the city’s charter sector to 200,000 seats. Democracy Builders, writing in the Wall Street Journal in 2015, said charters can “maintain the illusion of success; by maintaining or increasing the absolute number of proficient students while decreasing the number of total students (as low-scoring students leave) the number of proficient students is likely to increase; the charter industry should stop manipulating the system this way."