We can probably assume that some people who belong to the group are both unessential and innocent of the crimes of the group. The janitor at one of Dupont's buildings isn't to blame for this, at least under most theories of culpability. But there is a core subset of people who are, and whether they are punished individually or not, at the very minimum, they shouldn't be allowed to participate in business (any business) again. Otherwise, they run off and get C-level jobs (or really, vp/director-level jobs and up), and perform more of the same stunts.
Not that it matters, the companies that commit these sorts of crimes are always large enough that their political sway would protect them even if there were laws on the books that could theoretically dismantle them. And certainly, all such companies collectively have more than enough mojo to prevent the passage of such a law.