• the governemnt wants to freeze the global spending on pensions to at most ~14% of the GDP while the number of pensioners is projected to rise by something like 25% in the next decades: obviously each individual pensioner will get less with those numbers.
• the pension will be calculated on the whole career instead of the 25 best years (private) or the 6 last months (public). Since people have generally weaker wages at the beginning of the career, this will lower their pension.
The new system will be particularly unfair for people in precarity and/or with irregular careers (women in particular).
Life expectancy is increasing (well, not so much lately...) but not life expectancy in good health.
Something like the two thirds of people are already unemployed or on sick leave by 62 (the human body cannot stand forever...). Bosses don't want to hire seniors anyway.
As for people in some sectors having certain advantages, well, that's life. There are dozens of collective bargainings which result in advantage X or Y in such or such domain, some people have a 13rd month while others don't, some have more days off, etc. Oddly enough, neoliberals are only intestered in equality when it makes people's lives worse...