I must be missing something that everyone else is seeing. Isn't domain registration a competitive market? Who is going to be charging these high registration fees? Is it a company like Godaddy? If that were the case, wouldn't I just transfer the domain to a registrar that isn't gouging me? If a registrat wanted to charge google $500,000 to renew the name, wouldn't they just lose google to a company that will do it for $6.95?
As to your point Whydna, the same thing could be accomplished by forcing minimum 5-year registrations instead of 1 year.