Notice the word "want"

It's primarily due to them closing down WalMart Express, a failed concept that they tried. Supermarkets do this all the time, though they rarely let the failure get this big.

Aside from that, supermarkets shut and open new stores every year. WalMart announced that they're closing 289 stores this year.... but they opened over 400 last year. And will probably open in the hundreds again this year.

EDIT: Of the 289 stores closing, about 150 are from the USA (again, mostly WalMart Express). Looks like Brazil got hit hard too.

It's only Walmart Express from what I read in another article. They also said they're going to try moving most of the workers affected to other locations.

Walmart is raising their minimum wage to $10 per hour starting February, so it's most likely related to that.

This has nothing to do with wages and everything to do with there being a oversaturation of Wal-Mart stores across the country.  Plus the stores they are closing are the smaller ones which have a lot more competion from other supermarkets and dollar stores.

I have a hard time understanding USA economics.

How can you have a full time job and earn so little that you are approved for food stamps and still you buy ALL new games?

Small format Walmart going the way of the dodo. Likely sticking with the supercenter montrosities for the immediate future.

Kids. The more you got, the higher wage you can earn and still be eligible.

iirc from his posts, spurge seems to have a lot of kids in his life, his own, and his new partner's.

That's because you're thinking about in terms of economics and the salary a person takes home and that's why it's hard to understand. 

Also thinking about a government program by its name is a problem which would confuse someone as well.  For instance you might say why can someone work full time at a job and get disability?  

So...you think Walmart is closing its Express stores because someone running from President has talked about wanting to raise the minimum wage to $15 an hour?

Another thing I'd like to point out regarding retail wages. As someone who works in a major retail store, our wages went up considerably last year because stores are having such a hard time finding people. The economy is good, nobody is looking to work at places that pay less than $9-$10 an hour.