The latest printing includes an afterword by the author reflecting on the financial crisis, but most of the book is the original text.
I recommend this book to everyone with a white-collar job. It's an incredible read. The research is a bit out of date, but the truths still hold. If anything, the age of the research is somewhat helpful. The phenomena these days are more subtle, and many of us work in companies with flatter hierarchies than the 25+ level pyramids the author studied. So the distance in time forces you to reflect on what has changed and whether the results are relevant to you.
You will recognize so many of the situations as reminiscent of things you have experienced and haven't been able to put into words. It is 100% worth the read.
Moral Mazes is one of the rare books I return to and read multiple times. Far from being out of date, 40 years later it is more relevant and the research lines up more directly with corporate behavior than really any other research on this topic written since then. It really is a tremendous book.
"Advertising" for example could mean the benign "show me a picture of some product" or it could mean "identify who I am, how I behave, where I work, how much I make, who I know, and maintain and share a dossier on all of it"