We feel safer with cameras but in practice there are few cases where we truly are. I think what the kids are likely to learn from this is that an authority's sense of security is a more powerful demand than their own need for privacy, something with, to me, pretty direct connections to the overall worker-surveillance conversation. I'm not judging you for having cameras or even specifically recommending you don't, just agreeing that your fears are justified and they may not be, probably aren't, worth it.
TBH I'm not sure what the wealth link is either! But I was poor/working class most of my life, and am high income now, and have friends in both groups. I just do not see cameras in the homes of people who are not affluent, except sometimes camera-enabled baby monitors. It may just be a matter of access but they aren't all that expensive so I'm not satisfied by that explanation.