Arshavin's agent has called on Arsenal to increase the star's huge £80,000-a-week wages just four months after arriving in England.
Dennis Lachter says the club should cover cost when the top rate of income tax rises from 40 per cent to 50p in the pound next April.
"The British Government has suddenly started to solve their problems through the crisis of people who earn big money in the UK," said Lachter.
"If a player has signed a contract, it is logical that there were certain obligations from the club on the money that the player receives.
"Now suddenly, this tax rate change. The question arises: why, in this situation, must the player suffer? So, a club must deal with the problem."
"The situation is not simple - it is understandable that no one wants to lose their money. The hostage of this situation are just clubs. And they will try to somehow resolve the issues."