“Lawmakers in Illinois are so desperate to shore up the state’s massively underfunded retirement system that they’re willing to entertain an eye-popping wager: Borrowing $107 billion and letting it ride in the financial markets. …'We’re in a situation in Illinois where our pension debt is just crushing,' Martwick, a Democrat who chairs the committee, said in a telephone interview. 'When you have the largest pension debt in the world, you probably ought to be thinking big.' …”