I hear you but people seem to be making a really basic link for not buying clothes often with being scruffy. You can buy nice stuff and it still lasts you years if you don't become too fat or too thin etc.
That said, I do not like wearing formal clothing and luckily there is no situation where I need to.
Oh no, I get that. Looking scruffy to make a point is daft, and looking scruffy just isn't my bag. You don't have to spend a lot or often to look acceptable IMO.
I mean I buy 3 pairs of jeans a year, they only last a year because I burn through them quickly (and I have large thighs that rub a hole in them!).
Smart shirts last me a couple of years and I tend to have a dozen or so on the go, enough to be able to wash, iron and have some spares without constantly needing to wash and iron!
I have a disproportionate amount of sports related wear as I do a fair bit of it. Rash guards, compression tops and bottoms, hoodies, etc... but I only ever wear them for exercise. I don't like leaving the house in sportswear unless I'm actually going to do actual sport!
I don't mind wearing a suit as needed, i.e. going to the HoP or meeting VIPs - but to be honest, I've got to the stage now where I don't really care - unless it absolutely states shirt and tie, I won't!