He did not express loyalty to his supervisor in the customary way. In these nations, voting is often a way to show support for the government. People show disapproval or protest by refusing to vote. If the Bible forbids voting, of course, Christians must accept whatever social or financial penalties come their way. But if the Bible does not forbid voting, we do not need to abstain.
Some nations require all citizens to vote.
People who do not vote are fined or penalized in some way. If culture expects something ungodly, Christians must be willing to accept some penalties as they follow God's way. But if the Bible does not forbid a custom, Christians do not need to suffer punishment for unnecessarily refraining to keep such a custom. Even where there is no penalty for noncompliance, the church should not teach an unbiblical restriction. The Bible does not directly address the subject of voting.