According to https://www.icann.org/resources/pages/governance/bylaws-en/#article1, "The mission of the Internet Corporation for Assigned Names and Numbers ("ICANN") is to ensure the stable and secure operation of the Internet's unique identifier systems". Allowing arbitrary increases to the renewal pricing of .org domain names hurts this mission. Large increases (the only kind that could not be covered by limits) mean that some share of the .org domain names would become to expensive to be renewed. This will have a carry-on effect - the information present at the domains will vanish. Software that has been hard-coded to use those urls will stop working. And in general, the stability of the internet and the resources it depends on will diminish. For what reason? It's hard to claim that predictable pricing for .org domain names is a problem that needs to be fixed. Instead, the price protection that has been part of a .org domain is something that should be extended to other gTLDs. To do otherwise would be to run the risk of unconstrained cost increases threatening the stability of the identifier systems ICANN runs.