Take the 'voluntary' or you'd get the 'Involuntary'.
In some jobs there are almost-guaranteed 'job security' such as in some State / Fed jobs or 'the Union' job. Ten years ago, I held a State job with guarantees. They offered a Voluntary plan: One year pay and health insurance to me and my wife. I took that. I was extremely conflicted for the 5-6 weeks leading to the final day of the decision. During those days, a senior staff member approached me and wondered if I would take an enhanced role in future. I said No. Some fellow workers also begged me to stay and I still said No. I was too burnt out by then and frustrated. I had the time till the last minute of the work day to send an email to cancel my decision to leave. And I agonized and agonized till that minute but stayed with my decision to leave the job.
As I look back at that pivotal time of my life, I often wonder: Did I make the right decision by leaving? I had decent pay and decent 'Benefits' and was well respected as a software engineer. But it was also employee abuse which burned me to a crisp. I am a workaholic anyway! If I had stayed then almost certainly the salary would increase. But by leaving that State job, I was thrown into the Dog Eat Dog World of private companies where my Overachieving by finishing projects even before the deadlines have resulted in multiple layoffs.