The government didn't give anything like the level of notice they should have done. That's the issue. I think there were a few short pieces in the newspapers, which didn't even get close to explaining things properly in layman's terms, and the average person wouldn't have understood the implications. There was nowhere near enough publicity. Due to the lack of publicity, those women were not able to make alternative provision.
Letters were issued, but delayed for more than two years before they were finally sent out. As a direct cause of that delay, many women lost out financially when they should not have done.
So basically, the government fucked up and these women were adversely affected when they shouldn't have been.
Of course they deserve compensation.