What you suggest is not a good government policy in my opinion. A government wants educated people to not be scared to have kids. Leaving a job to be at home a few months and look a for a new job after is extremely stressful and risky, and it can destroy a career.

And long parental leaves are just normal and common in some countries. A medium to large company has no issues dealing with them. It’s part of the management work to deal with that.

Moreover it’s better for a company that their employees don’t leave.