People are not screaming to get 80% or 90% share of the profits. They are only complaining about people who shares like 5-10% and not doing much for the ecosystem, which is totally understandable.
I would think you are not saying that myself, gr33ndrag0n, cc001, or 4miners.net (there are others, but no need to list them all) are not doing much for the ecosystem. We contribute and participate regularly.
Also, do people understand that pools benefit the big bagholders the most? If you have less that 1000LSK there is no real point in voting for pool delegates. It will take weeks, if not months just to get back the cost of your vote; and after that your profits are minimal. You have more to gain by voting the delegates that will increase the price of lisk by adding to it; and those increasing the price of the lisk you hold. You can get much bigger gains that way.
The original point of voting was to have the forging delegates be active members of the community that add value to the system (like the delegates I have been listing).
The delegates that are not contributing to the Lisk network, need to bump up their percentage of pool reward to at least 75%, imho.
Why is it acceptable to have forging delegates that don't contribute to the Lisk network

They shouldn't raise their pool rewards, they should be voted out. There are plenty of worth standby delegates that are contributing to the Lisk network that should be voted in instead
For the delegates that are actively contributing to the Lisk network. Nobody is complaining about that. We just think that a reasonable amount to keep for yourself is 50% - which is MORE THAN ENOUGH. And give back to the people voting for you at least 50%
Who says active delegates that are not big pools are keeping it all for themselves? Example is that I have forged Lisk reserved just for worthy lisk projects and apps that I will help fund and/or donate to. Just like I donated to 5an1ty for his docker contributions to lisk.
Delegates should not just be keeping all forged lisk they don't share with voters. If they are a good delegate, they will put that forged lisk back into the system through donations and funding to others. If they don't and they just sell what they keep, they should be unvoted from forging; as we recently saw happen.