PRSI and USC are around €4k a year. That's €20k over 5 years, still half the figure quoted.
The total payroll deductions in tax, USC and PRSI for a single person earning €55k is around 28%. The marginal rates are very high and a disincentive to working more but the overall deductions are low enough.
Someone on €26,500 only has €3,725 in deductions. That's 14%. That's very low.
Low and middle income earners are under taxed in this country. High earners are relatively over taxed. The Middle might be squeezed but the State isn't doing the squeezing, not directly anyway.
We also have a very generous welfare system, as can be seen by this thread. I'm not saying that we should change any of that but the facts are the facts, no matter how upset people are with the world around them.
PRSI paid per PAYE employee is 11.05% + 4%.
So an employee on 55k has 15.05% paid into PRSI fund every year, 8277 euro a year. Yes of course, that's between you and employer but that's what's going in.