A sprawling post-quake Christchurch is projected to hit a population of 640,000 over the next two decades, NZ Herald reports, but Auckland mayors, former and current, are divided over whether officials should push to become a Super City. Auckland Mayor Phil Goff says the City of Sails has “benefited significantly” from becoming a Super City in 2010. But former Auckland Mayor John Banks warned Cantabrians to approach any amalgamation with extreme caution. Banks claims that Auckland’s Super City switch, while seeming a sound concept and philosophy, has been a “disaster”, especially around accountability for elected officials.