Every developed country has a minimum income scheme for old people.
But not necessarily a social security-based system.
Australia, for example, has compulsory contributions to (non-state) pension funds, supplemented by a state pension which is means-tested.
There are broadly three mechanisms for providing income in retirement:
- a tax-funded payment (entitlement to which can be contribution-based, means-tested or universal)
- a payment from a non-state fund — savings set aside specifically for retirement (could be an employer-sponsored pension scheme or a personal pension plan)
- general savings
Most countries rely on some combination of these three methods (the "three-pillar system"). A contribution-based tax-funded pension is a significant element of the system in many countries, but not in all, so it's not inevitable that Ireland will always have one.
Having said that, once a country introduces one, they're very difficult to get rid of. Barring the total bankruptcy of the state, politially speaking you have to honour the pension entitlements promised in return for contributions already paid, and you will need future contributions to do that, so it's very hard to stop collecting contributions. So I don't think Ireland will move away from a contribution-based state pension. But, yeah, it could form a smaller part of the mix in the future, in comparison to the part it forms at present.