Protesters from the Occupy Boston movement, local unions and area colleges marched through the downtown area on Wednesday to protest the nation's growing student debt, saying higher education is becoming too costly for all but the privileged. Tweet Be the first to Tweet this!ShareThis More than 200 protesters gathered at Occupy Boston's Dewey Square encampment, then moved through the city's financial district and up Beacon Hill to the Statehouse. Student loans are the No. 2 source of U.S. household debt, and total student debt now exceeds $1 trillion, which protesters say could undermine the economy.