It's not really fair to mock and make comparisons to a mythical chicken when £100 a month is a lot of money to many people.
I couldn't afford it. We don't have that kind of money available.
I don't dress well though. I'm not hugely interested in clothes and plus I just don't have the budget to do it. Today I have been wearing (and looked okay I thought - fairly typical clothing for me)
T-shirt bought in H&M part of two pack.... er... maybe £15 for the two.... 5-6 years ago? It's too small, shows off my belly, so I just use it as underwear but I like the colour.
Button up shirt. Bought second hand for €4. I don't know the brand. It's a bit too big but looks OK as an "oversized" kind of look.
Navy blue trousers, bought at H&M at the same time as the t-shirt. They are probably the smartest trousers I own. Beginning to fade a bit now. I don't remember the cost, would guess £20ish. I think they were in the sale.
Knit jumper, Petit Bateau. MIL gave it to me as a hand me down from older SIL. It's old but good quality and fairly timeless in style and I have been complimented on it. £0
Coat, scraggy scruffy, cheap but comfy from factory shop for about £20 IIRC about five years ago. Could do with a new one but for now, it works. I have a smarter, warmer wool one for when it gets really cold which was €60 from TK Maxx 3 years ago and looks as good as new, because it doesn't have a hood so I don't like it as much.
Shoes are (fake) fur lined, padded and made to look like hiking boots but they're not. They are four years old and not waterproof any more, support is gone in them but they are warm as long as I avoid puddles. TBH I hate shoe shopping because I'm fussy and shoes are crazily expensive. I had to talk myself into buying these because they were €50 and it seemed too much but they were actually reduced to €30 when I bought them.
I should dress a bit more professionally for my job, but I don't because I don't really know where to start. We came into some money a year or two ago and I was going to take a couple of hundred to get myself some better work clothes but actually it just wouldn't have gone very far at all, so I ended up dithering and then buying a load of €3 t-shirts from Primark and some pants because I was still wearing knickers I'd had as a teenager and the elastic had totally gone 
I really desperately need to save up and get some boots or something but they're all about €60-70+ and it seems crazy to spend so much on a pair of shoes, not to mention being over the €50 monthly clothes budget. I think I just have to get into touch with how much things really cost though and stop expecting them to be ridiculously cheap.
It sounds really stupid but I have lost count of the number of winters I've gone through not having properly waterproof shoes. I know that realistically I should prioritise that but it just doesn't seem all that necessary when I have some shoes and shoes are so expensive, plus they seem to wear out so quickly.