Almost every context in the Bible touching upon election has to do with service, not salvation.
MM
That's not saying very much since serving the Living God is what it means to be in an actual saving, personal, intimate, loving covenant relationship with Him. God didn't save anyone to not serve him! Everyone in this world serves someone or something! Therefore, if God never purposed for saved, chosen people to serve him, then this would mean they're still free to serve who or what they want.