Women born in the 50's did not, by and large, have the same access to making pension savings as men did at the same time, or as all groups do now. Wages were not equalised, there were no in work benefits for lower paid employees (very many of whom were women), scarcely any maternity benefits (and no keeping jobs open for women who wanted to return after having children) and many women just didn't have the opportunity to build up pension pots. Men retiring now have a pension pot on average, FIVE times greater than that of the average woman.
Therefore, raising their pension age by 6 years, very quickly, did not allow them enough time to save the difference (men's pension age increased by one year in the same time period) and they way it was communicated to them was very suspect.
Yes, pension ages should be equalised, but not until there is definitely a level playing field in all aspects of employment equality.