[FORUM] What examples of unexpected consequences have you come across?

[rfmcdonald]

The unspoken theme of my post this evening at Demography Matters, I suppose, relates to unexpected consequences. The people who ran Singapore after it gained independence from Malaysia did succeed in making their city-state a world city of note, but in so doing made it difficult for Singaporean families to sustain themselves, creating new problems.

What examples can you think of?