There must be a word in Latin

There Must Be A Word in Latin:

Perhaps our Eric Blair can help us sort out the puzzle that Mark Steyn lays before us:

Meanwhile, Sen. John McCain, Arizona Republican, in a quintessentially McCainiac contribution to the debate, angrily denied the Senate legislation was an "amnesty." ... He has a point. Technically, an "amnesty" only involves pardoning a person for a crime rather than, as this moderate compromise legislation does, pardoning him for a crime and also giving him a cash bonus for committing it. In fact, having skimmed my Webster's, I can't seem to find a word that does cover what the Senate is proposing, it having never previously occurred to any other society in the course of human history.

I think it occurred to Vortigern. I'm not sure, however, just what he called his policy of providing bonuses to Saxons who would "do the work Britons do not wish to do."