It is fairly simple work, doesnt require much training, and it pays minimum wage or slightly over.
Not entirely true.
My wife has been in retail for 25+ years. Most retail will pay more than minimum wage and managers can make $50K+, while District or Regional Managers can make well past $100K.
Hours can be long, especially for managers and forget about getting time off from beginning of November through second week of January.
Part-time employees are usually on their feet all day and have to listen to complaints all day. On top of that, most retail companies now have customer information lines which do nothing but provide another means for customers to complain. These setups usually impact bonus and compensation.
Additionally, audits are frequent, including inventory audits, loss prevention audits and secret shoppers. All employees are impacted by these audits.
Training is company dependent, but most of the companies my wife has worked at, most of the major retailers you all know, have extensive training, including week-long jaunts to some location, as well as periodic in-store training. In-store meetings are not held during the regular work-day, but usually on Sunday mornings or evening for 2-3 hours.
Now that I've written this and thought about it, you are way off.