I believe there should be a law, or at least some economic disincentive to motivate Amazon (and other ebook providers) to export/import collections from their p

I believe there should be a law, or at least some economic disincentive to motivate Amazon (and other ebook providers) to export/import collections from their proprietary readers onto competitors. Ereaders should not be tied to a given collection -- it is an insane state -- imagine buying a CD or DVD that could only be played in players belonging to a single company or an appliance that would only run on selected utility systems. Why is this considered a natural and beneficial state for books?