your mate is brainwashed.
Costs have gone up but not 1250 per bike in a few months. We are talking 8 quid versus air freight at 60 quid a bike
I am an old guy and been (literally) around the block a few times.
I think there are at least 3 factors in play here:
The Turbo Levo is clearly if not the best emtb in the market, its one of them. So demand has been very strong for them, despite (maybe because of) their problems with some users Brose motors, as it has demonstrated how Specialized 's warranty really is worth something ( and you pay for that).
Secondly , since the pandemic ( and even before it ) demand for ebikes and the Turbo levo, in particular, has gone through the roof.
I am sure you remember your economics 101?
In the long run, supply and demand are in equilibrium at the free market price.
Demand has gone up, supply has gone down (availability of components etc during/post pandemic)= hence price rises
Thirdly, the costs have risen of Specialized (& all bike mfrs) - not just better spec'd bikes inc. revised spec motors, new software (eg motor firmware upgrades now done "over air" plus mission control), but most crucially shipping. These bikes are made and built in the Far East. Again due to the pandemic, the cost of a 40ft shipping container being transported by ship (nobody is allowed to carry bike batteries on a plane) from China to Europe was about $1500 a year ago. Its now about $15000. Not sure how many bikes you get into one shipping container, but that huge cost hike has a direct and very tangible impact on the end price to the consumer
The moral is buy now, before it gets worse. Buy second hand....