Benitez is unhappy with the lack of funds afforded to him since taking charge two years ago, particularly in the last two transfer windows - Jacob Murphy, at £11m from Norwich City, being their biggest arrival since returning to the top flight.
Toon forward Perez, who enjoyed a strong end to the 2017-18 campaign, hopes that the boardroom unrest is resolved soon or Newcastle risk losing their popular manager.
"Rafa is key for our future," he is quoted as saying by Chronicle Live. "He made us reach this position of 10th in the table, just one year after going up, so it is a great achievement with the squad we've got.
"We have to look after him, take him seriously and listen to what he wants, and hopefully we can keep him here."