This is close to what I wrote myself, but the problem here isn't being able to fire people because they underperformed. The problem is what to do about temporary jobs that finish. They performed exactly as expected, maybe even exceeded expectations, but when the work is finished, you still need to get rid of the position, and they can't do that with permanent civil servants.
On one hand it's true, on the other people want stability in their jobs. You need a compromise between flexibility for the employer and stability for the employee, and one such compromise (in this area) is having a consulting company whose contract with the client can be easily terminated, while keeping the actual people doing the work with a job and stable income.
