Limited liability has nothing to do with this. Individuals can go to jail for crimes, to the extent they individually have committed them, but because corporations are aggregates and not individuals, it is possible for them to be guilty of crime when no individual would. On the facts alleged in the 737 Max charges, if any individuals would be guilty at all, they wouldn’t be the executives or shareholders you seem to be lusting for, but two test pilots (and its not clear they would be, only that they personally had the knowledge whose imputation to Boeing combined with corporate representations to the federal government made Boeing guilty.)