IMO 10 years in prison should be more than enough to discourage SBF from repeating it. And if it is not enough, then 30 years won't be enough either...
> then 30 years won't be enough either
But it's not about deterring him. It's about preventing him from doing any more damage to the society and potentially deterring other people from committing the same crime. IMHO this is one sector where draconian sentences might be actually very effective, people in finance tend to be more rational and calculating than average. If you get a to steal a few billion and maybe somehow stash a proportion of that spending 5 years in prison might seem like a reasonable deal, that's pushing it but maybe even 10, not > 30 though.