jim, I hate to say it here, but you come off as sounding disconnected with modern hiring practices, certainly from MBA programs. A couple of points.
Your first section is way off base. Many students are sponsored by companies (or Governments) to go full-time, and are headed back there after graduation. As was previously mentioned, scholarships play a huge part (I, too, got significant scholarships). Lastly, a huge number of students finance their education through loans. This idea that full time students and part time students are differentiated by ability to pay is not something I've ever heard before.
Truth be told, they seem to be differentiated by:
- Ability to get into the full time program. Evening programs usually have relaxed admission standards.
- Not wanting to forgo the lost income of full time.
- An employer that will only sponsor part time.
- Being unwilling to quit their current company because they're not sure they'll find something better.
A ton has been written about the different kinds of MBA programs (we haven't even gotten into executive programs), and the general consensus is that full time programs are valued the highest amongst corporate recruiters. One thing to keep in mind is that a lot of MBA hiring at top companies is through internship programs, which are effectively 10 week interviews. Evening program students that can't intern are at a huge disadvantage to full time students that can.
The other thing to keep in mind is that evening programs involve inherent sacrifices in the curriculum, teachers, and student experience. It is, in reality, a scaled back experience. Some of the best profs have little desire to teach until 10pm at night (note, I said "some". A lot do it.). The curriculum doesn't allow for a lot of the experiential learning pieces that full time students are exposed to (international travel, case competitions, retreats). Lastly, I think everyone understands that it is super taxing to work a 9-5, then head to class for another 3 hours. That's not even getting into all the outside-the-classroom work (team assignments and meetings) that's required. An MBA can be the equivalent of a full time job, and going at night can be like trying to hold down two full time jobs.
In terms of the second section, the reality is that, unlike law school, no one looks at class rank in MBA programs. It doesn't matter, period. GPA does, to a degree, but if you're hiring someone to be a quant wonk, you don't really care how he did in marketing or OB, and vice versa. Many recruiters don't even see or ask for students grades or class rank. There are a dozen other things you look for (employment background, undergrad school, degree, and GPA, case interview skills, behavioral interview skills, knowledge of your industry/firm, behavior at recruiting events, etc. etc.).
You can find all of those things at lesser schools (let's say W&M, Arizona State, Notre Dame, etc.). Indeed, I was the one lamenting the structural problem of getting big companies to recruit at non-top tier schools. Realistically, the simple problem is probably recruiting budget. Companies send recruiters and employees to schools multiple times each year, and recruiting at more schools takes budget and time. The same person with the same background and skills might wind up at either Duke or Arizona State, but it's easier to find him at Duke, because there will be a hundred other people with impressive resumes, and Arizona State might only have a dozen. Part of what you're paying for is access to these companies, but it's not realistic to expect Google or Apple to recruit at 150 schools each.
This is where the diversity conferences come in. The National Society of Hispanic MBAs, National Society of Black MBAs, Women in Business, etc. all hold huge career fairs each fall, and the organizations and attending companies are open and welcoming to all (regardless of ethnicity, gender, etc.). These are great opportunities for any MBA (from Harvard to University of Portland) to get exposure to companies, and I haven't seen that companies are particularly snobbish about schools in these kinds of settings.