For example there were many instances, were people were telling their boss what an idiot he/she was and I know of many cases were it even came to push, punch and shove. They did not loose their jobs for speaking their mind freely. On the other hand - while the west was allowed to tell their government what idiots they were, they boss was spared, because he/she could fire you (more or less) at will.

Also the freedom of social upwards movement was way greater in eastern Germany than in western Germany. Also the freedom of a better educational system (propaganda was massive in both systems none the less).

I think he mentioned indirectly the freedom to have a good education independently on one's parents wealth.