When the management teams noticed that the numbers are not meeting their expectations, they will consult with the incompetent and unethical HR teams to come up with a "right sizing" strategy. They will cut the long term, fully competent employees because they cost too much. They will down grade the job position so they don't have to pay as much; as for the quality of the new hires, once they have filled the head count, it is someone else's problem now. These are the kind of games being played at SAP.
As for the job grade and salary level, they are not revealed to the employees because HR does not want them to know where they are on the salary scale (there is a big $$$ gap in between the different ends of the scale) so they don't know whether they are being paid fairly or not or know what to strive for. Most employees are not aware of this kind of information because HR wants to keep them in the dark so they don't know what questions to ask. When you ask them for more details, they will tell you to go talk to your manager then your manager will ask you to consult with HR. Lots of dirty tricks by HR
On point post from @YGXachj-1bjq.