The ICC needs BCCI, as much as the BCCI needs ICC. But that doesn't mean that the BCCI should be given lion's share of ICC revenues, at a time when some of the smaller boards are facing bankruptcy. None of the other sports bodies such as FIFA or FIH follows a similar model. They divide the revenues equally, without thinking about from where the revenues are originating.
It's not correct to compare a sport like Cricket to Soccer in the revenue aspect because they follow different systems. The BCCI are a corrupt board and everyone are aware of that, but that doesn't mean that they don't deserve the lion's share of the revenue.
India is probably the top revenue source for the ICC which is why they deserve the lion's share. However, the BCCI needs to utilize that revenue more efficiently.
I understand that BCCI takes most of the revenue from the ICC tornaments etc but what about Australia and England Boards ? Aren't they also considered as main boards like BCCI. I dont think ECB and ACB can settle on any less revenue as compare to BCCI.