@Miljah
My mum used to go on about how she 'earned' her retirement.... Nope, a bloke working 9-5, retiring himself at 57- effectively paid for her to be living, as a widow when dad died aged 73, on £20k a year until her death aged 81. She'd done part time, 'pin-money' jobs during her lifetime.
The reality is that state aged pensions are now being drawn down from our own children's NI contributions, given that the cash our parents put in and the cash earmarked for our own retirements has already been spent on today's pensions.
I think the things that got on my goat was the barbed remark that I should be thinking of the family instead of doing shift work at weekends, because "everyone wants everything nowadays"- what like being able to pay the gas bill? While you and dad swan off to Australia eight times?
She was also never out of bed before 8.30am once dad finished work- which is fine, but everyone else who got up after 7am were considered lazy.
So your mother didn't care for the family, the home, and her kids, (including YOU,) and sacrifice a career she could have had, whilst your father was 'working 9 to 5 for 40 years?' 
I have to say, you sound very resentful of your mother, and very bitter. Bitching about her 'part-time' pin-money jobs, and sniping at her holidays abroad, and bitching about how pensioners are being 'kept' now by the N.I.of younger people.
Does your mother know how much you resent and dislike her?
Personally, I don't give a shit if people retire early and enjoy it, because I have always been happy with my career and my life.