Its a reasonable guess, but my onservation is you are wrong. Seattleites are generally enjoying these boom times, where jobs are plentiful and even waiting tables pays $15/hr. People seem to quietly appreciate the Amazon effect, it isn't remarked upon often compared to other issues of the day.
$15 and hour waiting tables is not really good. I was making around $12 an hour waiting tables in Dayton Ohio back in 2001, and I wasn't tipped. If I had gone to a place with tips I would have made much more.