The models are the expensive part of the kit. Paper and cardboard sell the models.
Do you have any sort of citation for this? Anything to back it up? Do you have any idea how much the cardboard costs? How much is in the Most Wanted pack? What the wholesale cost for 50% more would be? What the cost for the extra packaging would be? I don't really know personally, but I suspect it's non-trivial.
The Most Wanted pack contains: 6 dials (12 dial halves). 2 large ship bases, 8 small ship bases, a mess of tokens. That's a lot of cardboard. 20 Pilot cards, 19 upgrade cards. It's not just three bits of painted plastic.
I need a "Not sure if serious" gif here.
No, I don't actually have firm data. But come on... Are you serious?
But fine, let's play.
Simple comparison: Slave I and an X-wing. All comparison is Slave I first.
Cost: $30/$15
Large cards: 5/4
Small cards: 13/5
Cardboard: 2/1
Booklet: 1/0
Base: 1 large/1 small
So 1 large card, 8 small cards, and 1 extra cardboard plate are enough to double the price? A $15 LCG expansion pack is 60 cards - 12 times the difference here.
Most Wanted is pretty obviously a loss leader, just like the Core Set is.
If you question the core premise - that they're using cards to sell models - I honestly don't know what to say. I guess we can all be thankful that FFG isn't trying to exploit us by selling card packs, an instead giving us the cheap models packed in with the expensive cards
In your comparison, you completely miss that the Firespray model is also, what, three times the size of the X-Wing model? More than enough to account for the price increase.