Changing how a meta question behaves for just one question might be hard, and I can't think of a way to use the built-in tools to achieve this effect. (You don't want to use locks, because that prevents edits and comments.) There are, however, a couple things that a site can do to mitigate the effect of meta answer-sorting:
Individual candidates can edit their nominations to include links to their meta answers. I've seen this in some elections. When you're reading a candidate's self-pitch is probably exactly when you want to see that candidate's answers to the questionnaire.
Anybody with edit privileges can edit the questionnaire question to add an index with links to candidates' answers. I've seen this in several elections and I've never seen an objection, either from SE or from the community. Here is an example.
You could also try to agree, as a community, to not vote on the answers, so they all have the same score, but I predict that that won't work. Not everybody will get the message, and some who do won't comply. In large elections, some use the answer vote as a way of keeping track of which answers they've read.
An individual reader can also sort the answers on the meta post by "active" or "oldest" instead of by votes, but I realize that your concern is more about what other people see.