Complainer, I agree with you.
A single person over 65 has a tax exemption limit of 20k, married couple = 40k.
Note: only one spouse must be >65.
So a married couple can earn 750pw free of tax, if one of them is over 65.
Take a typical retired teacher / guard / higher civil servant / bank official or manager, who retired on 70k (one-earner couple).
Their pension is 700pw, tax free. They will also both get medical cards, even if one spouse is aged 25 (unlikely, I agree). They also both get free travel, as a spouse under 65 is classed as a "companion". Plus, once they get the medical card, they no longer pay the income levy or the health levy (I'm nearly 100% sure of this).
Great country, where else would you get it??!!