Again, literally verifiably untrue. A minor can legally have a job, and legal earn money, which is legally their property, and for which they are legally responsible to pay taxes. If they buy something with that money, that is THEIR property, not yours. If you take it from them, they would have legitimate grounds to file a police report and press charges against you for theft. This is not even remotely a theoretical or contentious area of law, it is very well established fact. At this point you're trying to argue that the sky is green or that water is dry, its absurd....
The only 'right' you have as a parent, as against your child, is the looming threat of imposing restrictions on the discretionary liberties that you allow them to have. You do not have any actual legal right or ability to stop them from making any speech, for instance, beyond the threat of grounding them if they do not obey you. If they say or publish something you don't like, you have no ability to sue them or obtain a court order requiring they delete it just because you want them to, because again you have no actual LEGAL recourse to police their speech, and nor does the government.
Similarly with the other rights, you have zero ability to compel them to self incriminate beyond the threat of grounding them, nor does the government because of the 5th.
Your understanding of US law is baffling, yes I can take their money if I want, yes I can sell their stuff if I want, this is established law, they could petition the court for emancipation, but thats the only recouse they would actually have. As for speech, they legally can't publish without parental approval until 18, any agreement with a minor is legally unenforceable unless you have parental consent, what does that mean? It means that until they are 18 its my house, my rules, and yes I can login into their social media and delete the account, yes I can seize the phone and destroy it if I wish. The law is very much pro parent and for a good reason, because the ability to correct behavior or limit what a child can do is deemed necessary. As for can they get a job, only if I permit it.
to give it to you simply, the right of a child to own property is defined by
[HEADING=2]Uniform Transfers to Minors Act[/HEADING]
This at its core enabled a minor to get gifts given to them as real property but it also makes it clear that until the age of Majority it is to be held in custodial care and managed for the minor as the minor is unable to actually own title anything. If the gift giver does not set it up as a trust where they hold title the law implies quite clearly that the parent(s) with custodial authority take over responsibility for the property, which includes disposal of property if deemed necessary for health, wellness or safety much the same way any other trustee would handle it, and since a parent by law is deemed to know how to best provide and take care of the child this would be a very hard legal argument for the child to win on, unless they can provide the parent acted maliciously, and I do have firsthand experience on this.
I like you was once very confused on this as a teenage 25 years ago, my mother kept taking money I got, and I wasn't allowed to control it, what had happened is she placed all gifts, payments, ect that I got including from my summer job into a trust account I had zero access to until I was 21, when I talked to a lawyer about it, he told me she had the right as defined in the above mentioned law and I'd be wasting time going to court over it, as she legally has that right.
I also got to experience the free speech nonsense you seem to think applies as well, I made a public statement around a group of her friends, one she disagreed with, in response I was punished for the speech, and forced to call people to apologize for said speech, she also revoked my ability to use public chat rooms or web forums for 2 months and then the following 6 months only under her supervision and I wasn't allowed to make speech she found disagreeable. I called the local police about it and was likewise informed she's allowed to discipline as she sees fit as long as it doesn't rise to the level of assault anything goes.
So keep thinking what you want, but please be aware what you think has no basis in actual reality, and to clarify one final point, a parent can 100% forbid their minor child from working, and can legally file action on any company that continues to give them work once they've informed the company they don't want their child working there.
What im going to assume is your either a teenager or recently an adult and don't actually know better.