> The price of domains should trend down.
Their value doesn't, so why should renewals go down?* It's not like registration is related to anything like cost of operation...
*: I'm not in favour of this, but living in a capitalist market, I'm surprised things haven't gotten much worse, e.g. a sliding scale cost for domains, so Amazon would have to pay $50,000,000/year for its domain, for example.