Should a feature request be voted based on its priority?

If people come to meta to post a feature request, should it be voted taking into account how important it is compared to other requests?

The only question I've found that could in any way relate to is this, but it's not really the same since mine is how requests should relate to each other.

I don't know how to elaborate more on this except with an example. Let's assume these are valid examples, just for the sake of the discussion.

Feature Request 1: Add two-factor authentication to login.Estimated Priority: 6 [Medium]

Feature Request 2: Make SO links look like META links (underlined). _{Yes, I find them cool.}Estimated Priority: 1 [Very-Low]

^{Don't forget, we should pretend both suggestions are acceptable.}

In this case, should Feature Request 2 be voted based on its importance compared to other feature requests, such as Feature Request 1? If so, wouldn't the votes be much more volatile - since the major requests could change from time to time?