I heard of similar a Taximan ran up nearly 3000
Got a summons was ordered to pay, then he presented himself to a Garda station and said he couldn't, he would go to jail.
What use to happen was the guard would write up a form and take the prisoner into a Jail then be sent home after a while.
Now they don't even bother there is no room in prison they just send you home from the garda station.
Warning I did not confirm this..But with the current climate of people with no money I have a feeling it is true.