Regional Internet registries have no control over the routing policies of any ISP. The IANA has instructed the Internet registries not to assign IP addresses based on any ISP's particular routing policy, rather on specific criteria including utilization efficiency. An organization will be assigned the number of IP addresses it can justify. If this number is not fully routable, that is an issue that should be taken up with the ISP(s) concerned.
This is just one big cop-out from the organization that CONTROLS who gets IP blocks. How the hell can I be a successful ISP when first, I probably can not justify 64 blocks (and if I do Sprint may change it to 128 anyways!) and second if the blocks I get are not routed through one of the MAJOR backbone proivders then they are useless to me and my end users! You are basically allowing one company to dicate policy and growth of the Internet. It's totally unfair to smaller ISPs and sets an ugly presedence as to just how the 'net will grow if you allow each organization to define their own rules that affect the Internet in general. Using old policies to justify not doing something against what is obviously discrimination against smaller ISPs does nothing to solve the problem.