Why would many MRs with high sales retire recently?

“The medical representatives (MR), also known as specialists who have recently retired from their companies, are personnel with high sales. There are now more retirements than turnovers among MRs.”

The trend of job transfers among MRs is significantly changing. It is explained that they had been transferring from a company to another only 1 or 2 years ago, but they are recently much focused on...