Becoming a PA/NP is not as simple as just going to school for a couple more years, and if you don’t already have a nursing background, and currently working as a nurse, it will most likely take significantly longer.
As far as pharma jobs are concerned, you need to understand just how many jobs are directly connected to a sales force. Almost every job at a Pharma company exists because of the sales force; from HR to corporate trainers, and every level of management. Front line/district managers, regional/area managers, Regional VPs, and Sales VPs all would not be needed if there was not a sales force to manage.
These managers/VPs may not give a damn about the sales reps, but they do give a damn about themselves , their families, and their careers, so because of that fact alone, Pharma sales forces will exist for the foreseeable future.