Perhaps you don't have big companies in Switzerland, whatever do I know about Switzerland. But there are cases when Big Company connect to a small outside company, providing something special and as Small Company don't connect to Internet they must use RFC 1597 and eventually Small-2 has been told the same story and use the same first numbers from RFC 1597, but when Big Company want to have a link to Small-2 as well, this becomes a problem.
If you'd followed the IETF list you would know that I made a comment pointing these problems out a -long- time ago, in particular from the point of collisions RFC-1597 is substantially worse than picking addresses at random (and no better than the time honored tradition of using addresses from Sun).
Simon, you don't seem to understand the real problem. Coordination has to be done on every possible level. Personally I don't care whatsoever about those that we force to use private address space, but they will eventually run into problems, so beeing last-resort we ouht to take our responsibilty and coordinate thing that are currently in a mess.
Private addres space is -private-: useful for networking all the power meters in Switzerland and similar sensible things, it cannot be an ersatz public address space. In your example: where do you stop? What happens if Big Company wants to connect to companies in Denmark and Norway (and Switzerland and Germany and France and Italy .......)? You ARE creating a second public address space. Simon