Child labour would also work; obviously children cannot be CEOs; but anyone who wishes to enjoy the millions raking in as a CEO would be willing to put their child into a loving corporate family where they can be put to useful economic work.
Product packaging can be required to carry math, science, English and business questions to allow children to study whilst packing shelves.
Not everyone has to be CEOs, some could be CFOs, COOs, etc. All those corporate executive positions in general are what average out to the $500,000 figure mentioned in the OP.
Also not all corporations need stores. There are construction companies as just one example. No store needed.