Trump is making a factual statement about those who call him. It is a true statement. It is about the caller, not about Trump.
Trump is not unique. I used to hang around the office of the late Illinois millionaire Jack Roeser. It was known that he was anti-corruption and would neither buy nor sell politicians despite his intense involvement in politics.
Both Republicans and Democrats, establishment and anti-establishment would call him and kiss his rear anyway. I’d be there when they’d call him and hear the call. Then those same callers would appear in the media, talk radio, etc and deny that they called him.
I suspect it happens to almost all rich people.
If he gives the money for that reason, takes the call, asks for favors, etc,, it is at least half about him.