Two things to keep in mind though. First, despite the Federal minimum, many states and localities have much higher minimums, for the reason that the Federal minimum is insufficient to live off of in many places. For example, San Francisco, has a minimum of $16.99/hr. or about £29,265 p.a., very close to Mrs. Laing's pension.
Second, whether it's the Federal or San Francisco minimum, it's at best barely sufficient even for a single person. Mrs. Laing had a family of eight people. The US national poverty threshold for a family of 8 is $40K (£33,249) [0], so her by those standards her family would indeed be very poor.
[0] https://aspe.hhs.gov/topics/poverty-economic-mobility/povert...
(Foreigner here, I don't have the minimum wage in the US super clear)