Any one sided divorce settlement that was not personally signed by BOTH parties is probably not going to be upheld on appeal. Even if the appeal is years later.
I know of someone who's divorce judgement was reversed because her ex (who wasn't at the trial, completely missed the process) decided he didn't like what the judge ordered. And appealed a couple of years after the fact. While they are still divorced, the financial issues regarding the assets are now being revisited.
You are not going to be able to get away with tricking your wife into giving you power of attorney and then filing for divorce on her behalf. And give yourself everything.
There isn't a judge who would even remotely see that as fair. It doesn't take a rocket scientist to figure out that there was some type of manipulation going on.