> Especially, any enforcement agency has a incentive laziness (heck everyone has one). If a worker can effortlessly produce cases against random schmucks, they have less incentive to work hard to find the people systematically evading them.

I fail to see how cases against random schmucks require significantly less effort than "real" cases. A case worker getting the tips doesn't know a priori whether the tip is credible and they still need to go out and take a look at the same things either way. If anything, an open-and-shut case where there are clear signs of abuse should be quicker than a wild goose chase. Sure there are some monsters out there that are really good at covering their tracks, and it would take a lot of effort in those cases to find the evidence of abuse, but how do you tell the difference between someone who is fantastic at covering their tracks and someone who never made tracks to begin with?

Social workers are not paid much, it takes substantial effort to become one, and the work is extremely emotionally taxing. If someone wanted an easy job, there are a lot of better options out there. While I'm sure there are some people who have lost faith in the system and are just working till retirement, the overwhelming majority legitimately want to help kids escape abuse. If it's the same amount of effort either way, why not go for the more fulfilling option?

The simple fact is that innocent people should not be treated like criminals, but abuse can and does happen anywhere. Either you dismiss more tips and make it easier for abusers to cover their tracks, or you follow up more bs tips which leads to more innocent people being harassed. At the end of the day there is always going to be somebody unhappy.