It has to be more than every cent. That would still incentivize cheating since at worst it is a wash for them. Given they do not come close to getting 100% of offenders, the five needs to be multiples. It’s like fare enforcement on subways and light rail. If you skip paying, you’ll likely get away with it for a while. But overall, the five will cost you slightly more than if you would have just played by the rules.