Ook al is er misschien sprake van enige scheiding tussen de diverse soorten werknemers, er is genoeg 'overlap' die ertoe dwingt dat dienstverlenende bedrijven – althans op de langere termijn – hogere lonen moeten betalen.
Even though the pools of workers may be somewhat segmented, there is enough overlap that it forces service-intensive industries to pay higher wages, at least in the long run.