Pretty much, yes. It is old fashioned retail and as far as desirable companies to work for go it is probably on the opposite end of the scale to google, facebook etc.. Also it isn't as though you necessarily need a degree in order to run a supermarket, in this instance it simply acts more as a crude talent filter.
The salary somewhat makes up for this and likely gives them a decent sized pool of applicants but it is still likely a rather different population to say hopeful amazon employees. They probably want to extract maximum value for the amount they're promising too so long hours, high turnover wouldn't be a surprise. Presumably the model works for them, they're able to find enough talented, motivated people by this method and let the unsuitable ones fail/quit/burn out.
