A death sentence is always excessive.

Fraud should be punished heavily though. Someone or several someones probably already died as a consequence of that money missing in the system. I'm not sure if a long jail sentence would be much better, with her being 67 it's a death sentence either way.

In my opinion they ought to follow the money. It's impossible for these amounts to just disappear or to have been used by her. It would make sense to keep her alive if there's any chance of recovering more of that lost money. But maybe that's the point.