> The trouble is, my generation faces lower real wages and higher housing costs, and those effects are so large that Starbucks habits are basically noise in comparison.
No, that Starbucks habit isn't noise. I consumed Starbucks coffee daily after Christmas a few years back (got a lot of gift cards for them for some reason). It was $2/day for a cup of coffee. $10/week. Continued through the year, $500 (holidays and such mean I won't commute, vacations I may still indulge). That's 2 car payments if you buy a modest car. That's a significant chunk of your rent, possibly all of it, if you're not in NYC or SF or somewhere equally absurdly expensive.
It's like a code smell. If you're consuming pricy drinks on a frequent basis, what else are you doing that you could do for a fraction of the price yourself? Look at every other $1/day habit you have. Sodas? Modest 1/day habit (along with being unhealthy) if you don't buy them at the grocery store is around $2/day (bottle or fountain). That's another $500/year. Netflix + Hulu + Spotify + HBO Now + Amazon Prime + Cable? Do you really need all of them? I didn't, kept Netflix + Amazon Prime and saved $1200/year, more than a rent payment.
There, between coffee, soda, and media, I've saved > $2000. If your income is low, as this article discusses, this is a significant percentage of your income. 4% if your income is only $50k. Higher if you consider your net-income on that and not your gross-income. You still want coffee? I'm in an espresso club at work, 8 people, espresso twice a day, costs me $20/year for my contribution. Drop the sodas, they aren't healthy for you anyways, drink one once a week or so as a treat.
Examine your spending, really look at it. You'll find that you likely have a lot of places where you "leak" money, because it's just a coffee, or just a soda, or just a cocktail. Then it doesn't become an occasional spending thing, like once a week or month. But more frequent, daily or several times a week. Your money is gone and you don't know where it went.