Newcastle United tax. The theory that football clubs increase their demands for a player the moment the Magpies come calling.
Toon supporters have often felt aggrieved by reports of clubs, agents and even players themselves trying to hold their club to ransom. Since the £300million Saudi-backed takeover last October, Newcastle have been reluctant to be mugged off over recruitment.
Chris Wood aside - when the Magpies forked out an inflated fee for a striker in their hour of need - the new regime have operated astutely. Newcastle are yet to smash their transfer record post-takeover but the arrivals of Bruno Guimaraes and Sven Botman did test the £40million paid for Joelinton in 2019.