The really lucrative jobs in NYC, are the ones with Hedge Funds that are based entirely in NYC. Places like 2-sigma, Jane-st, DE-Shaw, Jump, and others. The offers they make, are hard to match anywhere else, even after COL adjustments. If you're considering a job at a random NYC tech company though, I agree that the salary may not make up for COL.
Salaries in Seattle also work out to be higher given the higher COL in NYC. I owned a mid-sized house with front and back yard in West Seattle; my apartment in Brooklyn is much smaller and more expensive.
Groceries can be up to 2.5x as expensive at some places unless you travel out of your way to someplace like Trader Joe's.
Also, no state income tax in Washington.
That said, New York is New York.
You can find CoL calculators out there, and they have their faults, but Seattle is already an expensive city in its own right, and I simply don't see how you possibly got NYC to come out double. That's way out of line with the calculators.
I have a postdoc friend who lives in Seattle on slightly less than I do. They have a huge 1br in cap Hill with parking next to the subway with a short committee downtown or to UW. Meanwhile my apartment is the same price with a minifridge, a 40m commute, and no dishwasher/laundry/disposal.
Plus the PNW is just more enjoyable to explore than the northeast in my opinion. You definitely can make more in Nyc but the COL and QoL is just awful compared to the pnw
A lot of other folks place more value on not needing a car ever, lots of easy food delivery options, and access to any kind or show or performance you might ever want to see without having to travel.
It's very difficult to plan anything on work days if you're commuting into NYC, and you get to pay super high rents and property taxes for states with huge deficits and infrastructure debt which means the situation won't get any better. Seattle offers better food, recreational activities, growing future, and no income tax. I'd say the weather is better too, but some people really miss the sun, but you can easily fly to a beach resort for multiple weekends of the year with the savings of not living in the NYC area.
As someone who has gone through this for some 20 yrs, it's usually a faster commute to travel from Hoboken to pretty much anywhere along/south of the PATH line during peak hours (so 34th down to the southern tip of Manhattan) versus a starting point of the UES/UWS (which is where the comparable housing exists).
My commute from Hoboken to various startup locations in NYC was consistently ~45 minutes door to door, versus an hour for my friends on the UES/UWS.
If it was like Japan and you could actually make plans, then it wouldn't be so bad.
2/3rd the gross pay in Austin probably gives a significant "raise" in terms of relative standard of living and maybe 1/4 the money in many parts of Asia would move you even higher.
All I'm saying is that Average Salary is probably a bad way to compare across geographies.