Many comments here indicate that, if the company had just hired the best and the brightest A-players by offering sufficient compensation, the company would be more successful today. For any company of size, though, a normal distribution of abilities will be the result. Key to prosperity in that situation is understanding how best to lead and use the employees to the greatest effect. This does not mean sidelining the non-superstars and insulting them but supporting them to do the best they can. On the other hand, it also does not mean continually hiring and maintaining employees across the entire distribution. Difficulty in leading, directing, messaging, and motivating increases in management as the company grows while frustration and complacency increases in the rank and file.
No company stays on top forever. Even the greatest decline. Reinvention success is possible but rare. If you think problems like this are unique, look around at once great companies like Intel. Messages being posted by Intel employees will seem all too familiar.