are the new 'anchor stores' in strip malls.

Retail workers were once heavily unionized, and the work paid well.

Rich people have two things that poor people do not have:
1. Money, so when they see a good deal they buy large quantities, cases
2. Storage space: Even if you have the money to buy larger quantities, poor people do not have any place to stash it.

they release their "statistics" on how many "new" jobs will be created.

The question that is seldom asked and never answered is how many of those jobs are new, permanent, full-time positions that offer benefits and a living wage.

The poor use dollar stores to survive.

The rich have learned dollar stores are a great source for open stock quality glassware and party supplies. If you throw lots of parties you need shitloads of glasses and it is declasse to issue Solo cups when your bank balance rivals the GDP of Bangladesh. It is less expensive to buy 500 dollar-store glasses and a restaurant glass cart to store them than it is to rent glasses repeatedly.