Is paying fines corrupt? I would say that dodging fines would be considerably more corrupt.
The abstract indicates most of the fines come from "illegal off-label drug promotion" and "overcharging state governments". It could be argued that the first shouldn't even be an issue, and the second, depending on how "overcharging" is defined could be outright fraud on the part of big pharma, fraud on the part of state governments, or something in between.