3 ideas
UK student loan repayments are taken as a percentage of income above a threshold and any remaining balance is written off after a fixed term. Because of this, the headline debt figure matters less than your expected lifetime earnings, and many graduates will never repay in full. Voluntarily overpaying can therefore waste money that would work harder elsewhere, such as in a pension or savings.
Under workplace pension auto-enrolment, your own contribution is matched by an employer contribution and topped up by tax relief. Opting out to boost take-home pay means giving up money you can't get any other way. Young savers also give up the most compounding time, which makes staying in the scheme one of the highest-return money habits available.
Overspending is often driven by emotion and made effortless by retailer design, so willpower alone rarely works. The fix is to make spending deliberately harder: delete saved card details, unsubscribe from marketing emails, and track what you spend and how you felt when you spent it. Each step inserts a pause between impulse and purchase and exposes the emotional triggers behind it.