as what gipimann and joe saying, Going off the rate of 70000, civil servant pay will be cut by the 20%.
If you have a standard cut of pay of 32800 (or 41800 if you have transferred 9000 of partners, which is often done when one is self employed) the salary will still be in the high rate of tax, resulting in approx half of the difference in pay in net values, so net pay approx 6500/7000 down... ish .. ( dependant on which rate of prsi, D rate or A rate, usc of 7% tax 41%
The service for superannuation will also be effected, but there are ways to maintain the max tax free allowance should overall service have a shortfall of the 40 year max.
any queries dont hesitate to give me a shout.