CMS rules change the landscape of the UHG business. Pointing to the revenue and growth experienced under [X] rules and assuming the business can continue to grow and remain just as profitable under [Y] rules is naaive.
UHG is a publicly traded company. It must find ways to keep growing or keep increasing the bottom line for its stakeholders. If the rules of the business suddenly change, changes withing the business can be expected.
"Those at top are so greedy. They just want to fire everyone to make more money for their bonuses."
This may sometimes be true. However, it may sometimes not be. Some of the same folks making these difficult decisions are the same ones who approved bringing on all the new staff over the years too. Was bringing on new staff greedy too?
The same situation can be viewed a million different ways.