Not really. The supreme court has repeatedly said there are constitutional limits on punitive damage.
In fact, for federal common law, it's about a 1:1 ratio, and for everything else, it's supposed to be "single digit multipliers".
See exxon shipping v. baker and following cases.
So, of course, agencies keep their fines within precedent because they actually want to be able to defend them in court.
Ignorance is bliss though, blame lobbying.
(since some have privately asked: no, i think this kind of restriction is pretty much BS, but it is the law of the land, and it is one of the main reasons agency fines are so low in cases like this. The amount t-mobile gained by throttling unlimited data is pretty small, at least if their percent of users going over x amount of data numbers are correct)
