brasilia brazil scandal-plagued political class vote wednesday set 1.7 billion reais 542 million fund taxpayer money finance election campaign make dearth private fund ahead next year general election ban corporate donations couple dry under-the-table contributions kickbacks wake country big corruption scandal leave lawmakers struggle raise campaign fund low house congress approve bill pass senate take fund pork barrel appropriations government payments buy tv radio time party fund mean part improvements brazil discredit political system reduce proliferation party make hard govern latin america large nation without unwieldy coalitions base self-interest senate unanimously approve tuesday constitutional amendment limit coalitions party similar platforms go effect 2022 elections 100 lawmakers target car wash corruption investigation uncover network bribe private company seek win contract influence policies even implicate president michel temer several cabinet minister critics campaign fund say aim provide fund lawmakers seek re-election shield prosecution corruption shameful fund use unethical politicians sit congress say julio delgado leader brazilian socialist party psb single lawmaker investigation oppose backers use public money campaign argue organize crime would step finance politicians fund lack sprawl car wash graft investigation convict dozens executives brazil main contractor company shut flow undeclared payments politicians worry get money campaign company donate will engage illegal contributions say lucas de arag partner political risk consultancy arko advice positive side say congress set threshold party able access public fund free tv time base vote win help reduce number party today total 35 version story correct fifth paragraph say coalitions reform go effect 2022 elections brazil 's congress set fund cover lack campaign finance