Voluntary quits. Not only for what it did for the people who would otherwise be eligible for EI, but because of what it did to the dynamic in the employer-employee relationship. First of all, setting up a reward for, effectively, fraud: “I'm leaving. would you please lay me off?” We all know this is happening a lot. Or an employer who decides, “No, you're fired; you're not getting EI.” The employer decides you're not getting EI.
I'm not suggesting going to a period where there's no penalty for voluntary quits. I'm suggesting a penalty that is more proportionate than the current one.
Back to the same analogy, I would say the current system is akin to having car insurance where if you're at fault, you're not insured. We would never tolerate that.