I have been on my own since I was about 16. I had no clue what I was doing. I was a step away from being on the street and took a loan from a 'friend' to pay for first and last month rent for a room. They called the debt early and I got a credit card and cash-advanced to pay for that. How do you think that went as I was earning minimum wage? So from about 17 I was struggling to pay off a stupid credit card with a 30% rate on minimum wage.
Btw I'm Canadian. I couldn't go to university in Canada because of tax fraud by adoptive parents - I couldn't get student loans. I moved to the US and eventually was convinced by people I worked for that student loans were a necessity and once I was done I would have a good salary and be able to repay the debt. The fact the USA would give me student loans and Canada would not - definitely made me bitter towards my country at a young age.
However, I was given bad advice and I racked up way more student debt than was needed had I known more about the US system. Anyway, I worked full time while doing US university / college over years but my income was only enough to pay living expenses.
I can't tell you how much I would do differently if I'd had a bloody clue about what I was doing! Anyway, after years in the US I was sick of it and moved to France and used all my money to pay tuition for a Masters degree including cashing out all my retirement investments. I also worked full time while doing my masters and was known to be frugal and not a partier. I then applied for a highly skilled visa to move to the UK. It seemed impossible to get a job in the UK and freelanced for a company abroad for 2 years working all night until I got a job here. But oh how I love this country. Then I married the wrong person, sponsored his visa to come to the UK and ended up paying over £10,000 in visa fees while supporting both of us. Before DH moved to the UK he promised he would contribute at least £500pm because I didn't make enough to support both of us. He lied. Worse, he kept spending way more than I could afford, racking up debt. Without delving into details - when DH physically assaulted me I called the police and the police sent him back with a caution. I told them I didn't want him to come home and they said I had no choice because we were married. This led to years of manipulation, coerecive control and economic abuse.
Then when I finally left DH because he almost killed me - he was not deported. I was given an indefinite restraining order but he did everything to evade it. And you know what, I got offered a job abroad and I got on a plane and left with my infant. I left behind everything I had accumulated in terms of furniture etc. But I managed to get full legal custody of my child which was my goal. Perhpas my ex was merely a cocklodger because he made no effort to dispute custody and just wanted to avoid financial obligations it seems. My ex got away with making no financial contributions but it seems he managed to run up debt in my name in the UK whilst I was gone!
While we were in america I had on paper a good salary but was saddled with thousands of dollars in childcare and therapy costs and legal costs which kept me safe from ex but in more debt. My job was salary plus commission and all the deals I had built up in the year before the pandemic fell apart when lockdown hit.
In the end I finally felt safe to move back to the UK which to me is my home. The last company I was working for in the US gave me a job in the UK equal to the salary I had made in the past 3 years in the US. I would have been able to really hunker down and start saving. But no no.... I got made redundant along with the entire UK team less than 2 months after relocating back to the UK.
So why do high salary people struggle? Circumstances.