Seriously, that's a heads I've made 30k, tails I lose some of my savings account. For people in this position that is all the penalty they received is. Worst case they extend their mortgage, which is already likely many times this fine and so the extension is of minimal impact.
But also the people who commit fraud that takes out hundreds of millions of dollars (corporate collapses, etc) do make large amounts of money, and can plead poverty as a defense against full compensation.
e.g. When Enron collapsed, few of the people responsible were jailed, and in fact were giving themselves bonuses mere days before it collapsed. So it lost people $45 billion directly attributable to fraud, and emptied its regular employee's 401ks and pension funds. The victims whose 401ks and pensions were emptied won all of $85 million of the $2 billion that was stolen, and investors got 11 billion. So they stole billions, repaid a quarter of that, and few actually went to jail. Of the fraction that were sent to jail I can't find evidence that they had to return any of the 700+ million in bonuses they received in the year leading up to the collapse, let alone the prior fraud based bonuses.