A few problems with this rosy analysis:
1. Mississauga's vast, low-density road system, built in a non-stop sprawlathon over the past 40 years, is aging and will soon require heavy-duty maintenance costs. Without development charges to pay for this (the city is now built out), the current municipal funding model has a pretty abrupt time limit.
2. Mississauga would not enjoy as high a ratio of commercial to residential property tax revenues as it does were it not nestled right next to Pearson International Airport. So much for the unregulated free market. Given that airport-related development is peaking with global oil production rates, this economic gravy train is about to run dry.
3. Mississauga achieves its positive municipal cash flow by aggressively scrimping on public amenities and infrastructure. Toronto and Hamilton bear most of the regional burden of poverty (and their struggling municipal finances reflect this imbalance), but the lack of public transit in Mississauga will start to put the squeeze on tha 'city' as oil prices become more volatile over the next several years.
In all, Mississauga is heading toward a perfect storm of rising infrastructure costs, falling industrial revenues, and curtailed driving as a replacement for a real urban transportation system.