For people considering PhD, you work does not have to pay for it. 97% of PhD students are sponsored by the school either through fellowship (the best option), research assistantship (a very good second option) or teaching assistantship (the one I had which gives you a high workload in the PhD program, I think it is good for a Masters) . I was in a PhD program before I left with my Master's. Luckily I realized PhD wasn't for me before I was 4 years deep in research. I didn't pay tuition and was paid a stipend per month (about 1400 dollars)
I would advise you all to apply and try and secure funding from professors or schools. Your work does not need to sponsor you and I doubt if any would when there really isn't a need for it in the workplace. MBA's on the other hand would be nice for them to pay for it as very few people are funded by the school through scholarships.