AFAIK It's mostly cheaper due to lower sales tax (aka VAT/GST which is ~10% vs 18-27% in Europe) and no China import duty. Finally being local currency helps somewhat because of currency stability I'd guess.
The purchase price is lower without a warranty, but the actual incurred risk cost is higher.
Absent a warranty, that's not only a risk shift from the manufacturer to the consumer, but a real cost shift, as steps which might increase reliability are not taken and the consequences of those decisions (made by the manufaucturer) accrue to the purchaser.
There is also the incidnece cost and the cost of liquidity or credit required to front a repair bill in the hundreds or thousands of dollars. Given that much of the US cannot meet an unexpected $400 expense in a month, this is a significant consideration. MacBook owners may represent a more affluent portion of the population, but a $10k repair bill over four years remains significant. That's a constant $208/mo reliability tax on that particular unit, for this owner.
Note that in this case, Apple did eat the cost as the repairs were covered under the AppleCare Protection Plan.
Those extra margin could have been repurposed to Service Revenue, getting Apple Care+ by default. ( May be having one accidental damage instead of two ). Just like how the Mac is putting money into services revenue for MacOS, iCloud, Map and Siris.
The consequence of that is instead of a possible lower cost Mac lineup with M1, you now have the same cost but longer warranty. Apple now also has an incentive to make the Mac last longer to minimise any AppleCare cost they get within three years.
Now, it only covers defects, but that’s what most warranties do.
In the EU, where a longer guarantee is mandaded, state tax aside, the prices aren't that different. MacBook Air $999 US (849 €) vs 1129 € France. Of that 188 € is the state tax (VAT), which means the price difference as far as Apple pockets is 1129-188 - 849 = $92 or $108 dollars.
So that $999 would be say $1109, a 11% increase, hardly 20-30%.
(And that's not even counting the higher cost of business in Europe aside the VAT, which also factors in that 1129-188 price).
I absolutely love the consumer guarantees act we have here, and the protection it gives.
Edit: NZ has 15% sales tax and this is missing from the above equation. It accounts for most the difference.
Considering all these other costs, I reckon a 20% markup is great value for a 3-year warranty.
Like others though, I really all Apple products globally should come with a 3-year warranty - you pay over the odds for Apple hardware, and should get high-quality, reliable kit in return.
In New Zealand you are getting a 3 year warranty and getting something guaranteed in return - and the extra price appears minimal once tax differences are included.
How is that vast majority of price increase?
I certainly have missed that.
Government should mandate that, as in does in other countries.
But many american consumers don't believe in government rules about consumer protection, lest some of this "innovation" we've witnessed is discouraged...