Think carefully. Enforcing child poverty can seem like a good idea, I agree. But it's important to remember economic truths. First, that childhood poverty has life long debilitating effects.
The second economic truth is that of "Opportunity cost". Ask yourself, would dobbing this girl in cost you the opportunity to make more children more poor? After all, one should aim for the maximum return on the investment of your time and idle jealousy. In this case, that would be inflicting the most human misery and harm possible.
That suggests there is some other, greater evil that you could serve here. Could you not simply "accidentally" infect them with a nasty infectious disease that had long term debilitating consequences? Or perhaps traumatise them psychologically. Remember to escape from being held to account for your actions by employing a devious strategy of manipulation and 'gaslighting'.
