PaulBrislen:
Retail minus was always a con. Because the Commerce Commission chose to average retail prices across the board, Telecom simply had to keep one or two highly-priced retail plans in the market (regardless of uptake) and that would skew the playing field. For a long time the most popular plans in New Zealand were more expensive at wholesale than at retail.
Whilst I agree with the rest of your post, I don't think this part is quite correct.
The UBA calculation was done with the weighted average price of the broadband plans - meaning if few or no customers were on a plan it had little or no impact to the UBA price. There would be no point keeping a highly priced plan in the market for this purpose alone as if no customers were on it it wouldn't impact the price.
http://www.comcom.govt.nz/dmsdocument/8411
see clause 4.3.8 and 4.3.9
No, the real big crock of the UBA price calculation set by the comcom was that it included a component for 'data cost' which was rarely updated and was well above the actual cost of providing data. The more data people used, the lower the UBA price would go.
sounds good in theory, but this had the effect of giving Telecom an extremely strong economic incentive to not increase data caps.
Increasing data caps would let people use more data, but due to the way the comcom set UBA price, this would end up costing Telecom millions of dollars for every extra GB used. Orders of magnitude higher than the actual cost of providing that GB
During the period 2006-2011 datacaps barely changed at all in NZ. But since separation in 2011 (when the UBA price was locked in and so this no longer had an impact) we have seen data caps skyrocket and price points compress - no surprise since Telecom is now able to give more data without incurring this artificial penalty, and therefore will only incur the actual cost of the bandwidth used which is much lower.
The comcom/govt is squarely to blame for the existence of such low data caps in NZ - they set the economic incentives and Telecom had little choice but to follow