Provider independent addressing also puts the balance of negotiating power in the hands of the customer, rather than the provider. If they don't like the pricing, they can just go elsewhere and hey, it's really easy.
RIR policies is not the right tool to regulate ISP behaviour.
And RIR policies do NOT regulate anything. Your comment is not relevant to the suggestion (above) that RIPE needs to meet the needs of that segment of the IP address user community that needs to have IP addressing independent of their ISP.
Market regulators (national and international) should define the requirements and make it mandatory for ISPs to ease the transition from an address-block to another, prevent DNS hostage-taking etc. It's very similar to what's already done to provide number portability in mobile markets.
There is no point in discussing such things here since RIPE has nothing to do with regulators. --Michael Dillon