Yes, this. That has been so important over the last 10-15 years--not to increase spending in lockstep with increases in income. We check each other on this a lot as we see one of us starting to acquire too much or start turning our noses up at something that was previously totally adequate. It's allowed us to have more discretionary income for things like trips, instead of a new $3,000 couch just because we could.My husband and I are in our mid-thirties. He works in web development and I'm a supervisor for account servicing. We're fortunate to have enough disposable income so that we can take a trip each year (sometimes to Disney, but not always). Candidly, our combined income has nearly doubled in the 10 years we have been together. That said, much of our day to day spending hasn't changed in those 10 years (aside from paying a bonkers amount for childcare the last 4 years). Our life isn't frivolous. Our home is smaller than most of our friends and our corresponding mortgage payment is also much smaller.
I recognize we are fortunate. Traveling and spending time together as a family are very important to us so we prioritize those things in our budget.