No one has real data to show that a higher block limit = more fees overall for miners, it is simply a misunderstanding of how transaction fees work in real life.
Here is real data that shows that over the last five years, higher block sizes = more fees overall for miners.
What are you talking about? Block size has unquestionably changed (increased) over the last 5 years. The increase in the block size--such that it's now approaching the anti-spam limit--is what has precipitated this debate.