But usually when experts and academics get together, they thrive on debate, disagreement and challenge.
We do thrive on debate and challenge. However, unlike people arguing on the Internet, we don't disagree with each other for the sake of it. There are a great many academically "controversial" topics which in fact enjoy almost complete consensus whilst academics battle vigorously over the final details and nuances.
Where do you think academics get their research funding from? Which academics get professorships at top universities? Yes those who pull in the research funding.
Oh great, another direct accusation of corruption
. You are absolutely might that academics need research funding and that funding levels are one important measure of success.
I'm sure you don't mean to suggest that all academics in receipt of funds to do research (that would be all of them, because we can't pay for our work using unicorn farts and happy thoughts, unlike Brexit) are liars who write whatever the funding body wants to hear. Indeed, academics are usually the first to pick apart each others' research (see above) and one of the things we might look for is where the funding came from, BUT it's the data, methods and reasoning that are the really important bits.
So I think what you're saying is that only academics who say something you disagree with are corrupt liars?