I only receive 40% of my SS that I earned because I have a 15 year pension from a state that didn’t pay into SS. So half of my career I paid in. Without WEP I would get around 1k SS per month instead of 455. I would only be getting my earned benefits and nothing more.
SS benefits are proportionately less generous as lifetime earning amounts increase. If SS records show someone only worked 15 years and didn't earn much, SS's (generous toward low earners) math likely shows that person
could get $1000/month in SS benefits.
However, WEP means SS hasn't looked at earnings in a vacuum since 1983. Public pension benefits are also considered lest people take advantage of SS's generous to low earners policy while also dipping from another
publicly funded old age pension plan.
TT, if you're getting $1000-$1500 (or more) per month in school pension benefits (including perks of some kind) for a 15 year stint of teaching, plus $455 from SS, that's not an bad deal, especially if you took SS at 66 or earlier. Most people do paid work for longer than 30 years before retiring.
Like you, I stopped working for several years when my children were born, then worked part time throughout their school years. My old SS statements show I'd worked 43 years, including HS & college part-time jobs and ten years as a reasonably well paid professional, by the time I filed for SS seven years ago at age 65. (I've now worked and paid SS taxes for 50 years.)
I received benefits of $1610/month-ish back then. (Because I've continued to work and pay into SS, my benefit base has bumped a little bit, plus I've gotten COLA increases, so that $1610 has gone up.)
My point: contributing to SS for 15 years and receiving $455/month in benefits for that amount of time isn't out of whack. $1000 would be, particularly if you weren't working as a highly paid professional, and especially because you worked another 15 years for another
publicly funded pension.
SS's policy of heavier payments for those at the lowest end of the earnings scale may make it seem like you're being screwed, but you're actually not. If I received SS benefits in proportion to what you're hoping for, my monthly check would nearly triple.
On an aside: As was true of many couples in our generation, my husband contributed to SS steadily throughout and was a higher earner. We semi-retired when I turned 65, took my benefits, but delayed his SS until he turned 70. His higher earnings and the 8% bonus per year for delaying those benefits mean his benefits are roughly double mine, so our combined monthly SS is significant.
We saved diligently for retirement because we had no pensions besides SS and continue working part-time to this day.