The idiom you are looking for is “to rob Peter to pay Paul”, meaning that you borrow something from someone to give it to someone else.

In Britain, it means the Church tax was to be paid to St. Peter’s Inn (a city in the area called Rome) and Paul’s in London. As was used in the Roman Empire, it means the church tax was to be paid to another church in Rome to make money to pay the Paul tax.

(More information about this can be found in: http://en.wikipedia.org/). org/wiki/Rub_Peter_to_pay_Paul/ )