Yes, there's no reason for the 60-40 split. If you look at the EI benefits, many of them are social benefits. The employer has no control over those social benefits. They become a larger and larger percentage of the EI benefits over time.
At one point, the government paid 20%, employees paid 40%, and employers paid 40%. It switched over to employers paying 60%. There's no reason employers should be paying 1.4 times the amount that employees are paying.