Agree that Amazon won't upend the Swedish labor market model. But do they really need to do that to operate with a healthy profit? And if they think they need to revolutionize the labor market to be profitable (enough), would they really establish a presence in Sweden then? My feeling is they'll establish a business like everyone else and not even try to pull a Toys'R'Us.
Sweden has mostly sectoral bargaining. Many/most things are negotiated between the unions and trade associations, not between union and individual enterprise. When Amazon sits to talk with unions (70% of workers belong to union), they discover that many things have been settled in a bigger table.