I'm not really sure where people get this idea that suburbs are drowning in liabilities where dense american urban centers are overflowing with revenues. The opposite is the case almost everywhere you look. Or that suburbs are only surviving by pushing costs unfairly onto cities. Most suburbs (in the case of Dallas being plano, irving, frisco, southlake/westlake) are self governing municipalities with their own school districts, police, city management, and credit ratings. Sometimes people say it's just that suburbs are new and have yet to pay the piper, but even in america's (and Dallas') oldest suburbs, many of which have replaced/renovated infra several times over at this point, they are indeed stronger financially than the urban centers they surround.