No.
Empirically, myself and my sister have witnessed shoplifters personally in recent months. I know this is anecdotal data, but anecdotes (especially personal ones) are enough for myself. At least in my area, it seems like shoplifters _are_ on the rise.
I don't need to prove it to other people on the internet. My own eyes with my own life is enough proof for me. If that's not enough for you, whatever. Seeing news reports that others are seeing similar rises matches my "gut check".
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Now people stealing food from grocery stores is... you know... the lowest level of shoplifting. These people aren't stealing like, luxury goods. They're clearly just trying to survive. Its not like a criminal gang or organized crime that'd be deeply rooted and/or difficult to deal with.
IMO, its weird that people would rather shoplift than to apply and/or use a WIC card (food stamps). So its a conundrum for another day in any case, its a crime (albeit relatively victimless. Sure sucks for the staff and the grocery store but I've seen worse...). But its still speaks poorly for neighborhoods and makes people feel less safe. So yeah, it needs to stop. But I can 100% believe that shoplifting is on the rise today. Anecdotally at least.
There's other low-level crimes, like obviously not-paying for the subway, that I think is on the rise by my eyes as well. These also make people feel unsafe and/or unappreciated (tax dollars wasted, etc. etc.) and is bad for our neighborhoods.
I do know that statistically speaking, the personal savings rate of people has declined, wages haven't kept with inflation, etc. etc. So these actions make sense in the greater economic situation IMO.
I don't necessarily want a police crackdown to throw all these people in jail. But we do need to do something, maybe make WIC cards easier to apply for (at every grocery store for example), or stuff like that. We literally have a food-stamps program, why aren't people using it? Why are they shoplifting instead?
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If I cared, I probably would start by interviewing / personally talking to cashiers at my local grocery store before I trusted online articles anyway. And I'd suggest you do the same if you cared about this issue. The internet is just not as good a source of information as the front-line workers here.
Every grocery store clerk has a feel. Talk with them next time you visit the store, don't be a political asshat about it but it wouldn't take more than 1 or 2 minutes to ask them if they've noticed more shoplifters. Obviously don't eat up all their time either (they're on the job after all). With luck, you might see a manager watching all the clerks who'd have more freetime to talk about shoplifters too.