You don't have a good option other than trying to gift away the purchases. Perhaps there is a charity cause on the store you can fund and then gift an app or two to make up the difference.
Even large sums can be disposed of with box sets or movie collections that go for between $30 and $130 on iTunes, but this isn't much better than just going shopping for yourself since you need to narrow down cash equivalent into specific app and music sales.
I've never heard of Apple budging on this requirement when someone asks to have it lifted, and unless they had a system for tracking these "refunds" and transfers, it would mess up their accounting for sales / returns in one tax region to shuttle funds from one to another.
You could of course ask billing support for the country in which you purchased the gift card account.
Perhaps for amounts more than the price of 5 complete music albums, Apple Support can work some refund out?