Joined Cases T-543/16 and T-544/16: Judgment of the General Court of 13 December 2018 — Carpenito and Others v Council (Civil service — Remuneration — Annual adjustment of the remuneration and pensions of officials and other EU staff — Regulations (EU) No 422/2014 and No 423/2014 — Adjustments of salaries and pensions for the years 2011 and 2012 — Duty to state reasons — Proportionality — Legitimate expectations — Rules on social dialogue)