Really, it's more of a management problem than a coding problem. Short-term thinking, bad hiring/outsourcing practices, and poor client expectations management, among others. A framework or language isn't magic pixie dust that will make these problems go away.

At this point I'd prefer to work on a well-managed, professionally coded project written in PHP than one written using <insert-python-framework-du-jour-here> run by idiot managers.

One of the factors I considered when I switched jobs earlier this year was that the new place has a policy of devoting 2 months a year to refactoring :)