With Lloyds being fined £218m for Libor fraud, that's three of the big five banks in the UK that have now been fined a 9 figure sum for conspiring to defraud by fixing the Libor interest rate. An estimate on telly suggested that the full cost is probably over £1bn in the amount lost due to this deliberate conduct.
So... if you defraud the government of a five figure sum of benefits, you go to jail and are rightly abused. If you defraud the country of over £1bn you get fined a portion of it and not a single individual gets a criminal conviction. Surely there should be a few people losing their freedom over this for a very long time. Unlikely though as it's seemingly not in the public interest.