It's not that healers aren't queuing. It's that if people find themselves in a party in a group without a healer then often they expect somebody else to switch to a healer. Sometimes people take the initiative and switch - which is great. If they don't, though, then it just usually leads to a loss.

We don't need more incentives for healers. We need the PvP community to stop expecting everybody else to play a healer and just bite the bullet and do it themselves if one is not present. Granted some people do not have access to a healer or are stubbornly sticking with a particular job because they really want the experience at the end...

...but it's rare to find a group where absolutely nobody has access to a healer.