I really don't think ROI of individual cases should be a benchmark for the justice system (or, actually, a lot of the processes of democracy).
There are endless reasons against, but just to state an obvious one: prosecution should not depend on the subject's ability to raise the costs for the government–both because it would create an incentive for such shenanigans, as well further tilting the justice system in favour of the rich.
There are endless reasons against, but just to state an obvious one: prosecution should not depend on the subject's ability to raise the costs for the government–both because it would create an incentive for such shenanigans, as well further tilting the justice system in favour of the rich.