The best example is how they treat averages: As part of their "win-win" scenario: the new average income for the state of Oregon would rise. As if individuals would actually directly benefit from the average arbitrarily going up.
Inversely, one of the benefits of joining Idaho is the lower cost of living vs Oregon, disproportionally averaging the PDX metro area as their own cost of living.
However, the whole thing is chock full of the assumption that everyone would be happier and better off if elections were less competitive. It's such a weird document in that the group is effectively arguing to gerrymander themselves into a less electorally relevant position.