

What purpose would deportation of a citizen serve?
Presumably the same purpose (if any) the deportation of a noncitizen would serve.
One of the defining things about citizenship is the right to live in the place you have citizenship. Typically countries cannot leave persons stateless so deportation would be pointless, at most they pay for an air fare back, assuming there’s somewhere you can deport them to.
You’re right, fines should be levied equally if that’s the appropriate punishment. Putting someone in jail is expensive, it would seem counter to the point if the punishment for “abusing the system” was to further extract funds from the system to pay for someone’s housing and food would it not?
So why not take away those rights of citizens, if deportation is so beneficial?
I didn’t; I gleaned it from your comment and your seeming endorsement of this double standard.