Why your job sucks: Sub shop employees fired two days before Christmas.

[Vox Moi]

14. UI is part of the grand bargain

Another other part is 'Employee at Will'.
Companies pay for unemployment insurance, that is if they can't frame the termination as 'poor job performance' or some other fault on the part of the employee.
UI is the sole (and poor) mitigator for the carte-blanche companies have in terms of firing employees.
The Employee-at-will doctrine gives companies a huge lever with which to control, cajole and intimidate workers.
Underlying Employee-at-will is the 'I built this myself' mentality. My company, my prerogative.
The effect this has on issues like management harassment, whistle blowing, bargaining for wages is obvious.
Your job is a privilege. You have no rights.
That means that your access to resources like housing, health care and just about anything you buy with your salary is also a privilege that can be revoked at any time, for any reason or no reason at all.
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Allow me to suggest that since the corporation is a creature created by the state, it should also act to the benefit of the state. That would include the people who work there. There is no reason that the rules of incorporation should not also include providing due process in dealing with employees.