To some extent yes, but this is only good if you can make sure that not a single malicious adversary has access to the source code. My assumption would be that

To some extent yes, but this is only good if you can make sure that not a single malicious adversary has access to the source code. My assumption would be that in the voting case, the ones in power do have access to the code, which is actually worse than open sourcing it. Offtopic: IMHO, the only way to fix the voting software issue is to deanonymize the voting process to some extent, which is a hard problem by itself too.