Changes in severance policy

It seems the change is happening worldwide. It also appears many did not know of the change until they were notified of an RA and saw their severance cut.
Is this true? Did no one get an email about the change. Did anyone get notified by their manager? How does a company change a policy and not tell anyone?

This information was either provided to the manager prior to or at the time of announcement. He/she should have discussed this with the employees . It should not have been a surprise and if it was the manager did not do their job.