MBA will always boost your career on the Management side. But, MBA is not the only thing that matters. The most important thing is whether you are better than other MBA graduates or not. If you are not getting good hikes and promotions, maybe development is not really your A game, maybe you'd be better at Management. But like I previously said, it all matters on skills. If there's a person with 1 year of experience and is good at management, he might get a higher salary than you. So, prepare yourself and then you will surely be successful.