>Would it not be more beneficial to everybody involved if more resources were put on to such a popular and backlogged category?
Wouldn't be beneficial to _me_. Ain't popular with _me_. And _me_ is the only resource _I_ have to put anywhere. (Replace _me_ successively with each of the 10,000+ active ODP editors, and you may understand the situation.) There are lots of measures of "search popularity", but the one WE use is, "is there anyone who cares enough about the topic to do a good job of reviewing large numbers of sites?" and in OUR polling sample, the answer for THIS topic is "NO."
Can that change? Yes, there are many potential editors out there, and one may really be keenly interested in this subject.
Is this a problem for users? Apparently not: they can find lots of appropriate sites already. Is it a problem for editors? If so, they apparently have higher priority activities, both within the ODP and perhaps even in real life.
And that IS, quite literally, "everybody" that is "involved" in THIS project.
So the only possible answer is: "No, a thousand times no! We get more and better work from volunteers by encouraging them to reviewing more sites that they find interesting."