They have to work an extra year per sabbatical, and the number of sabbaticals is capped to some small number. Say, 3 for example. In the US you can start draw

They have to work an extra year per sabbatical, and the number of sabbaticals is capped to some small number. Say, 3 for example. In the US you can start drawing retirement benefits at 62 at a lower rate, or at 65 at a higher rate. So this would be similar. Eligible for benefits at 62 with no sabbaticals. Or 65 with 3 sabbaticals.