[Zenst]

Spaghetti code is in many respects the byproduct of poor design and lack of planning at all levels.

For some though it is a job security abstraction layer.

[coliveira]

I believe spaghetti code happens more because of training. Programmers that are not trained to think in an OO way tend to produce spaghetti code, when a simple decomposition into objects would suffice.