I wonder if there's a term for the more general concept - rules are put in place to help/empower the individual/less powerful only to have the system corrupted

I wonder if there's a term for the more general concept - rules are put in place to help/empower the individual/less powerful only to have the system corrupted by the powerful interests already in existence. "Regulatory capture" is also an example of this idea but I think there's a larger pattern.