Have you thanked Walmart recently for providing a job to 2.2 million of people? They go out of business, then those jobs are gone.
Maybe a part of these jobs will be gone, but surely not 2.2 million. Amazon, Lidl, Aldi have still big expansion plans. Take over Walmart would be an opportunity for them.
Last year one of the biggest travel agencies with a fleet of own planes, own hotels everywhere and shops in many countries went broke. In a very short time big pieces of the company, including the employees, were taken over by competitors.
https://en.wikipedia.org/wiki/Thomas_Cook_Group