Heck, might even help the Central Powers if the British and French run out of money, so they can try getting American business lobbyists to open trade with the Germans.All the loans prior to US entry into WW1 were secured on collateral in America, which can be seized in the event of non-payment, so my guess is those loans probably do get repaid.
The larger (and unsecured) loans made after the DoW would presumably never have been raised had America remained neutral.