Well, maybe you can work out a deal with a coyote to lend your number.
The only problem I can see is using a “child’s” social security number to open a line of credit. What a surprise it will be to children upon reaching their majority to find out they are already in bankruptcy. Now THAT would be a bummer. As to paying SS and taxes under the SS#, I can see where you might not care — it’s that credit background check you can’t get a job without that gives me pause.
So someone shows income attached to your social security number, puts you in a higher tax bracket (you're now making almost double). They claim 10 deductions, have nothing or almost nothing taken out. You are saying you're more than happy to pay the rest of this increased income tax?