Technical Debt is a common term used in IT circles, and a useful metaphor when discussing planning and tradeoffs (although too often I fear management don't understand the interest repayments side of it)

Want I want is a term that is more easily understood by non technical business users and management, something which says to them "Your half considered last minute must have change is going to leave the system in a right bloody mess, and its going to take lots of time and effort in the future to clean it up", but in a nice punchy phrase.

Any ideas ? Some word to do with foundations, rotting, derelict, decay, structurally unsound, negleted, condemned ?