Todjaeger
Potstirrer
As Assail mentioned, the objectives for the corporate sector, as well as sources of funding etc are completely different from Defence and other state/gov't functions.Don't fight the white.
Depreciation and the cost are capital are a reality for anyone in the corporate sector, and the rest of the state sector. I've yet to hear a convincing argument that Defence should be any different.
The objective of a business is to make money for the owners/investors. As a result of that, the total value of the business needs to be known at various points for a number of reasons, amongst them tax exposure, total value in the event of sale, value for collateral, etc
Plus as Assail mentioned, whether or not there is an adequate (or any) ROI. If a business earns $1mil. carrying out business activity, but uses up $3 mil. worth of equipment, then there is a net decrease in value to the business.
OTOH for something like Defence, the product is intangible, since the product is the defence and security of NZ and NZ interests. That is not something the can really be given a price tag.
Given also the source of funding for gov't departments (taxes, fees, etc) depreciation has no relevance, because the equipment being depreciated has no role in funding the department. In business, depreciation plays a role in part to determine ROI, but also as an estimate on the value of that piece of kit, in the event the kit were to be sold, or to estimate when it would require replacement. It has also been used to 'cook' the books of some companies, by using a skewed depreciation estimate. The US company Waste Management comes to mind, where at one point, the company books were using a 55-year est. depreciation cycle for their rubbish-hauling vehicles.
Now depreciation for most of the NZDF kit makes little sense, since from a business/commercial enterprise POV, most of the kit has no predictable resale value. Take a $500 mil. frigate at initial purchase for instance. Assuming a full 30-year sevice life, one could not point at the frigate after 15 years of service (before or after MLU) and state that it is worth $250 mil. Nor can one point to the frigate at different periods in it's service life to determine the ROI from the $500 mil. purchase, because the frigate is not generating revenue.
If anything in business, defence and emergency services function like insurance expenses and/or hazard mitigation efforts. They are sunk costs, generating no income or revenue but are in place to prevent or mitigate the appropriate circumstances. And even that is not a particularly good analogy, since in many instances, the monetary value can really only be determined after the fact, if it was needed.