Hack the system? No, that’s not the reason. I’m talking about incentives. If you give the miners the power to decide how large the blocks should be “based on demand”, then you’re giving them an incentive to fake that demand for them to earn more in fees. Especially when most of the coins are mined out.
if pools wanted to game the system. they would ALREADY TODAY only the transactions of say high fee. and always ignore transactions of low fee. thus forcing people to pay a high fee.
you would ALREADY TODAY see all blocks half/quarter filled with only high fee tx's.
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what you would not see is pools filling blocks with their own transactions. because guess what. they wont make any money out of it. charging themselves a fee is just paying themselves. they wont gain anything from it.
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so realise what pools would actually do if they were trying to game the fee system. they would all be 'half blocking' to only accept high fee transactions.
but guess what.. 12 years of bitcoin.. 8 years of pool mining. and that strategy has not been in play. even though pools could do that..
why..
because they prefer to play by the rules rather then cause controversy.
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worry more about the development of code that is going to cause more issue about fee's and transaction count. as thats the issues that HAVE and will cause more controversy