It's delusional. I tried that and failed and regretted it. By the time the money is spent, the happiness is gone.

> I’m trying to do the opposite and start spending to enjoy the fruits of my hard work over all these years.

You are approaching it the wrong way. It's like having a solution looking for a problem. If you don't feel the need for something, you don't need it.

> How do you adjust your lifestyle as your salary grows and you find yourself in the incredibly fortunate position of being able to upgrade to more when you don’t really need/want to?

Don't upgrade to more. I regretted upgrading to more even though I could afford it. By the time you upgrade, you realize that it's more of an overhead than anything else.

> Yet as I watch my bank balance grow as I earn this typical tech-job salary that I could have only dreamed of 15 years ago

This, right over here. Start investing your money into diversified assets (bonds, stocks, real estate, risky ventures, etc...). That will keep your money tied up so you don't think about spending it. If the investment works out greatly, you can now leave your job and start traveling around the world in 5* hotels.