To me, it's not surprising that stealing a bunch of credit cards and secret documents gets you ten years (maximum, of which he'll probably serve three to five if this is anything like other crimes that are eligible for parole). But I'd welcome evidence that I'm miscalibrated.
Ah, I misread. I thought it said, "He was sentenced to serve a maximum of ...", but actually it says, "He was sentenced to the maximum of ...". Ten years, then. Still not terribly surprising to me given what he did.