Some assumptions (feel free to play with the numbers and check my sums)
We have 275,000 civil & public servants
They are each paid 20% more (on average) than the average industrial wage, say €700 p/w or €20 per hour
They each work 45 weeks of the year
Half of them take their Christmas half-day, one hours banking time per week, and two privelege days per annum.
Christmas Shopping Cost = 137,500 X €20 X 3.5 Hours = €9,625,000
Banking Time Cost = 137,500 X €20 X 1 Hours X 45 weeks = €123,750,000
Privelege Day Cost = 137,500 X €20 X 7 X 2 = €38,500,000
I think that comes to a total of €171,875,000 for little hidden perks - its the sheer scale of the thing that makes it hard to swallow.