Sometimes civil suits are brought for reasons unrelated to collecting monetary damages. Even if Zimmerman doesn't earn much, a judgment against him will be a tight leash on him for the rest of his life, adversely affect his ability to apply for credit and conduct business. There would be added attention to his family finances and taxes that will be a huge inconvenience. Also, with a judgment against you, which you can not pay, your ability to seek employment is hurt.

Some people file suits for the judgment, as opposed to the reward. I've filed suits for people, who have not paid my wife in her business, knowing that we wouldn't likely see a dime. But we filed as it may discourage others from withholding payment, and it would make life inconvenient for the individuals, who refused to pay a just debt.