But the benchmark this system was compared to was already a trust-the-client system : coin payments! I'm sure you can defraud coin-op machines, it's just not easy or common enough to worry too much about.
It's my impression that consumer payment systems operate on a good-enough principle. Being fraud-proof is not the goal, the goal is not to spend more on security than you are preventing in fraud.
It's my impression that consumer payment systems operate on a good-enough principle. Being fraud-proof is not the goal, the goal is not to spend more on security than you are preventing in fraud.