[nutheracc]

Could it be argued that an understanding of how x works is irrelevant, only the outcome matters, in that individuals who don't understand the workings of x are still able to tell if the outcome is positive or negative for them, and vote on that.

[tremon]

Not in this case. The full outcome of the Brexit vote will not become clear for another ten years, probably. Both sides have tried to win over voters by scheming with "irrefutable facts" that clearly showed the other side's facts were wrong.

[TeMPOraL]

Not only that - ten years from now people will probably assign positive and negative effects of Brexit to other, more recent causes. The idea of people voting based on the perceived outcome for themselves is limited by their memory / attention span. A lot of important decisions, like those related to infrastructure, have immediate costs but bring benefits only years later.