You tell me!
I would suggest that “any material” sounds more kneejerk than critical. Let me put it this way: Can you recommend any journalistic outlet which is demonstrably devoid of funding by exploitive elites?
There is also the difficulty of presuming a unified intent from any such group of people. Are all US aristos who fund PBS oil-slinging evangelists? Are all the ones you mentioned agreed in their ideology and agenda, or might there be various factions within them?
Does “extreme” here refer to some statistical absolute, or is it relative to the norms espoused by any particular group?