Each victim deserves justice, not just the first few.

Justice should be about punishments proportionate to the crime, getting dangerous/likely-to-reoffend people out of society for a time, and hopefully eventually rehabilitation.

Justice shouldn't be about the victims. Victims should have no say or sway over a criminal's sentence. Certainly someone who has hurt more people likely deserves a worse sentence (if for no other reason than they're probably more likely to continue to hurt people otherwise), but that's not strictly "justice for the victims".

Of course, that's the (my) ideal... our actual justice systems rarely live up to it.