I haven't seen any thread on this and it deserves one. It was reported in the Sindo that TDs are exempt from paying rates on their constituency offices whereas registered charities are not (well certainly not on their shops).
Relevant link Charity forced to pay rates but Enda escapes scot-free - National News - Independent.ie
It's actually crucifying some charities! Surely we have this the wrong way around and the TDs should do the decent thing and draft laws making themselves pay up without any additional expenses to cover it and registered charities should be exempt (provided they're not paying absurd salaries and expenses to CEOs, which would make even a TD blush!)
In the meantime, all TDs should be made adopt a registered charity in their constituency and pay its rates!