I just hit 20k reputation, thus I'm now able to vote to delete answers.
Now I know there isn't a delete vote queue, so just voting to delete isn't all that reliable, or is it?
So (unless such a queue is created), by assumption, whenever you vote to delete, it would make sense to also flag (but not necessarily vice versa) (correct me if I'm wrong).
Thus, I propose a delete vote causes an automatic flag.
And given that users are given a limited number of delete votes already, these shouldn't count towards your flags. But flags are refunded (aren't they?), so perhaps it should, I don't know. If it does, we can probably get rid of the delete vote limit altogether.
The point is to get the post to a place where it can be seen.