Abatement is a standard feature of public service pension schemes.  If you are in receipt of a public sector occupational pension, and following retirement, you return to work in the public sector, you may not earn more, by way of “re-employed” salary and pension, than the up-rated salary for the post from which you retired.   Where your new salary and pension exceed your previous up-rated salary, your employer will deduct the excess from your pension.  This is known as ‘abatement’