Who pays for it depends on how you look at it.
The owners/shareholders of the company that lent the money pay in the form of reduced profits.
But they will have built a level of default into their prices - so honest customers of the same company are paying.
This will filter through into higher interest rates generally - so anyone who borrows pays.
This will filter through into higher prices for everything, so anyone who buys anything pays.
'ordered to return to the UK and pay off their debt' - ROTFL