Ireland is bang on the EU average for taxation of high earners. It seems Austria has higher (although not massively so) taxation of high earners - source below.

Ireland has the most progressive taxation system in the EU, so low-earners do indeed pay less personal incomes taxes than any country other than Cyprus and Estonia.

Ireland is definitely not a tax haven for tech workers - you're the only person I've ever come across to hold that opinion. The UK may be closer to that, as self-employment is much more attractively taxed there than Ireland.

https://www.uhy.com/uk-imposes-highest-taxes-on-inheritance-...