I used to stay in a paying guest accomodation during my first job. My roommate was a guy who had just joined ISRO - we graduated same year but from different colleges. And I also had a chance to interact closely with 2 other friends who were working with ISRO at that time (one was a senior in college).
His payscale started at Rs.8000 per month (in 2001 that was less than $200usd). He was a production engineer. He would be up for next revision of payscale & promotion pending a review in 4 years! He knew that.
I used to wonder what keeps them motivated and I used to constantly question them. One common thread you find based on these conversations is that they are extremely satisfied with work - each of them used to say that what they are working on is UNIQUE that nobody else in ISRO is responsible for. And buck stops with them. They knew that.
That sense of ownership and the way the employees connect to a much larger cause is something unbelievable at ISRO, in my perspective. I used to be in awe of every conversation about his superiors, the work and their perspective of the organization in general.
I think it is an interesting case study in organizational behavior and what keeps you motivated with factors other than just money.
Teaching is another profession I think requires similar mindset. ISRO somehow hires the right kind of people, the employees within the organization are not so flamboyant setting examples for new hires and helps them connect in a way it makes people see contribution to a bigger cause.
Just my observation from what I have seen from close quarters.
BTW, it is also given that he knew they get pension after retirement, medical benefits & all such taken care of for his entire life because he is part of the organization.
Would love to read if there are any case studies on this.