>"By increasing the size of blocks, transaction fees may not be available to supplement mining revenue and so those who do not have access to cheap or free power to mine;"

why?
wouldn't a bigger block size actually allow for more transactions per block, therefore more fees to be collected, and the cost spread out among many more users (thus still keeping tx fees low). If anything, wouldn't bigger blocksizes are needed to suplement the losses of coinbase rewards being halfed.