To understand this we have to recall how they arrive at their decisions. In its most basic form that depends on two things: one is the information they have and the other is their ability to process that info. For sure they make very complex decisions. Which makes electoral data absolutely fascinating.
The First 60-0 Was The
Optimal Decision, in 1982
It was the optimal for voters to keep every candidates of the outgoing Labour government -- which many consider as the best we ever had -- out of Parliament given the paucity of information that was available then and their sophistication level. Still if you dig a little bit you find out that there was some kind of order in the way they voted. This is apparent when we see who among the unreturned candidates grabbed the highest percentages of votes in their respective riding. As Table 2 shows SR got the highest, followed by SB and Duval. KJ who implemented free education after he came up with the idea was sixth. This table may be familiar to you. It is the same one we used to propose that best loser seats should have been allocated to these people as they had the highest ratings among voters -- Nicol Francois, a candidate from Rodrigues, actually came in right after Duval but doesn't appear here as our proposal wouldn't have granted him an additional seat to reflect the relative sizes of the voting pools of the two island. So what we can note here is that voters seemed to have said "Ok, we're booting all of the guys out but we have decided not to treat everyone of you the same way."