No. You've got the tax evasion (if any - certainly you could set it up so you're paying the full taxes) plus the illegal activity, so two crimes already there.

No. You've got the tax evasion (if any - certainly you could set it up so you're paying the full taxes) plus the illegal activity, so two crimes already there. In fact, it's less serious for society if you launder it, because then you're paying taxes on money you wouldn't otherwise pay taxes on.