Walmart increases surveillance. Is the increase of security ethical or a violation of privacy?

Inspired to create this by Greyparrot’s thread.: 

https://www.debateart.com/forum/topics/9323-4-walmart-stores-to-close-in-chicago 

So as current rumors are surfacing about Walmart, here is the conjecture so far.: 

While stores are now being shut down, several Walmart locations are now putting strict regulations in place for tighter security. 

Said security will have cameras using facial recognition to highlight suspected thieves and detect items that were unpurchased. 

The measures even include an employee shutting down a self-checkout device at anytime if they suspect a potential theft, forcing the customer to seek help. 

In which case, a cashier will be more than happy to assist and reboot the machine, under the guise that it was a bug in the system. When in reality, it’s very deliberate. 

There was another video I saw talking about this, but the claims being pushed were slightly darker.

@NoOneInParticularBeforeIGoToBed

What stops X from editing videos, for false accusations against innocent individuals?

Still better than Iran where advanced cameras are used to detect women who dont wear face cover.

When theft is on the huge rise, you can either close your store either increase security.

There is zero expectation of privacy when you’re out in public, amongst the public, doing business in a public space. So no, it’s not a violation of privacy. 

And of course it’s ethical, for the business and the consumer. Higher theft that goes unaccounted for (ie - stopped) means cost of insurance to cover the losses is passed onto the consumer via marked up pricing of certain goods and services. 

..."

There are over 4 million in the United Kingdom alone, which is unsurprising given how it's known for having more cameras per head of population than any other country. "...

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..."China leads the world in CCTV surveillance

Estimates vary on the number of CCTV cameras in China, but, as we've already explored, IHS Markit's latest report estimates that 54 percent of the world's 1 billion cameras are located in China, which equates to a total of 540 million or 372.8 per 1,000 people."...