Four months of campaign messages about the long-deferred needs of Jackson Health System and the urgency for the aging public hospital system to more effectively compete against South Florida's private and not-for-profit hospitals paid off Tuesday. Miami-Dade voters approved a referendum to raise their property taxes and fund $830 million in upgrades and new equipment and facilities for Jackson. The victory at the polls helps secure Jackson's long-term future in the face of declining reimbursements from state and federal government programs and the uncertainties of the Affordable Care Act, said Carlos Migoya, chief executive.