Brazil's economic policy chief Guilherme Mello said on Friday that stabilizing the country's gross debt-to-gross domestic product ratio depends on monetary policy decisions, offering a glimpse of what he could support as a potential central banker. Mello made the remarks after Finance Minister Fernando Haddad revealed this week that he had recommended Mello to President Luiz Inacio Lula da Silva for a vacancy on the central bank's interest rate-setting board.