[eatsyourtacos]

>How is saving costs not a justifiable reason?

Most likely because you could justify any firing to be "cost savings" and thus defeat the whole purpose of job stability.

Think about a tech company.. they could increase their staff by 25% for a year, using that team to advance products, meanwhile the new employees think they have a stable career on their hands.. but then the tech company is just like "nope, you are all fired". And they benefit into perpetuity for what the employees did while the employees are getting nothing more from that company and don't have a job.

Yes I'm oversimplifying, but that is part of what these laws are trying to avoid. It's unfair to the employees to have these mass hirings and mass firings with mass information asymmetry. In theory it would create more of a culture of "we hired you for the long term".