I think there are some precedents on the ability to opt in. I know in Alberta, entrepreneurs have the opportunity to opt into the workers' compensation program, so I think there's some history there, there are some precedents.
One-stop shopping or one solution won't help. You have a very diverse and very varied workforce, a different entrepreneurship cadre, at very different places in their lifespan, so I think you have to look at flexible policies, and opting in would provide the most flexibility.
There are opting-in provisions in the EI program already, for example, for family members or closely related members in terms of family-owned enterprises.