Murphy also led the development of more than 25 miles of new riverfront trails and urban green space. "Big idea" initiatives such as these, combined with the commonwealth-imposed century-old restrictions on annexing any suburbs or consolidating with the county for a "regional" or "metropolitan" tax base to equitably spread costs to commuters and urban dwellers alike and drove the city to the brink of bankruptcy. Several initiatives to modernize the state-controlled regional tax and government structure to reflect the rapid growth of nonprofit universities, hospitals, churches, and parks within the city limits with the rapid population migration out of the city to formerly rural suburbs and counties all failed to be approved by the state.