Hard pill to swallow truth-bomb headed your way.
"Pay it forward" in drive thru lines is mostly unnessecary. Especially at Starbucks. The person behind you wouldn't be in line if they couldn't afford to buy their 8 dollar drink. While its a nice gesture, its really just well-off people taking care of other well-off people (with very few exceptions.)
Consider, instead, if youve got 8 bucks to give away, thats about the average HOURLY salary of the barista at the window busting ass to take care of you. They have a tip jar and could probably use it more than Bougie Becky behind you in her Lexus.
Thanks.