Thereafter loans are based on Libor + whatever percentage. What the top up is is determined by lenders bearing in mind that they themselves are in competition.
Most references to this issue revolve around the rate being artificially lowered : not increased. As such investors who lost out on overnight money or short term money whatever would in theory be owed by those who gained i.e. borrowers of almost any description.
Simplest thing

would be to unwind all deals , with any commissions repaid, to correct the situation.