Promoveatur ut amoveatur (Let him be promoted that he may be removed) is an ancient practice in the church.  From the CDF, there are few positions that would be seen as a promotion -- which itself reflects poor ecclesiology.  Curial officers, including prefects and presidents and whatever other exalted titles they might have, are bureaucrats in service to the church's pastors.  Any pastoral assignment, including as a curate (parochial vicar), ought to be seen and experienced as a promotion from the curia.  I would like to see Cardinal Muller an Cardinal Burke promoted to parochial vicars under the authority of seasoned pastors who could supervise their work.