My mother lived on benefits/child maintenance from high income ex from age 0-13 while I was a child and from what I can gather was receiving about £2.5k a month total (I calculated this just now though it was probably even more in the past). We lived in a paid off house bought by my father so no mortgage.
Despite this there was never enough heating, not enough food so we were underweight (not drastically, but noticeable enough for regular comments) and I didn't notice it but my sister pointed out we both had far worse clothes than most people.
I think most the money went into her private pension which allowed her to retire very early and on (admittedly small) luxuries for herself. Even just little things such as her having a deep bath everyday while we had a short shower every other day kind of sucked.
I've spoke about this with my aunt (closest relative) who says the money "wasn't just for us", but AIBU to think that with this this much coming in we should have had a childhood where we didn't have to worry about the absolute basics?