Hence my (somewhat downvoted) comment in that I think the refunds should probably just be issued aa Treasury Bonds with varying maturity dates. Cashing out all t once can only lead to more chaos/disruption to the broader economy.
The sad thing is the "paid" back will be to parties that likely already passed on these fees and won't be passing on the returns as pure profit instead... and to middle-men companies who don't really add much value in the first place.