Working permits are needed in order to secure a working visa for people who want to go to Ireland to find employment
. With the rigorous screening process of applicants from all over the world, only a select few will be able to find themselves flying to Ireland for a guaranteed employment. This is the sad truth that immigrants have to bear with them. Some spend years applying for a job overseas but to no avail. But lately, websites dedicated to answering the question of "how to make money in Ireland" have been springing up and proliferating like mushrooms during rainy season.
It can be possible. Being a member of the European Economic Area makes you eligible to move to Ireland without obtaining the necessary working permits. And that also gives you a job in that country. However, if you are not a member of the EEA and still you wish to go to and work in Ireland without obtaining working visas and permits then you can go there as a tourist and find employment for yourself. It has been done before.
Applying for a job in this kind of situation might be hard but it is not any different from the job application process of people who are registered nationals of that country or legal immigrants granted with a working permit. Substantiating your claim for employment and making the employers agree with you will eventually lead to you processing your papers for legal immigration and working permit in that country. And that's how to make money in Ireland without a working permit.