I mean... FB alone has something like 3k engineers in Seattle. Google is almost done with a campus that will house 10k in addition to their already large Fremont and Kirkland footprints. Zillow, Redfin, Expedia, and others all have HQs in the greater Seattle area. Unicorns like Stripe, Lyft, Uber, and Airbnb all have offices here.
You really think that, with all that, Amazon and Microsoft make up 95% of high salaried jobs in Seattle?