A little overly simplistic but the point is made, and there is some legitimacy to it.
Another overly simplistic scenario.....18 year old Thurston Howell IV gets his tax bill delivered to his frat house at Harvard and 18 year old Elmer gets his out of the mail slot in the dilapidated mobile home he shares with his crack head mom and 3 younger siblings he is trying to provide for by working at Taco Bell and with a second job as a bag boy at the Piggly Wiggly. The concept that they benefitted equally will probably be humorous to one and infuriatingly asinine to the other.
Well done on the names, I got a chuckle on both.
But it still doesnt change the personal side of it.
Me buying mcdonalds meant I wasnt investing. Same with Elmer. We were all given the same benefit, but what we turned around and did with that benefit is on us.
Take your scenario. Thurston goes to the strip and blows his load in an hour. Elmer invests his return. Suddenly elmer is the one who benefits the most from his choices of what to do with the benefits. Especially when it comes to immediacy of need or proportion of total wealth.
100 bucks may be a good bit of money to Elmer, while Thurston probably wouldnt even notice 10Gs getting stolen from his capris. Thurston still got more total money, but the 100 Elmer got has a more immediate impact.
Your default argument rests on what are largely issues of scale. If thurston invests 10K and makes 10% return he walks away with 11K. Elmer invests 100 bucks and gets the same 10% ROI so he walks away with 110 bucks. You say the investment favors thurston even though it's the same ROI.
Instead you want thurston to invest 10k, end up with up 8k while elmer invest 100 bucks and ends up with 1000.
How is that any type of fair, equal, or equitable?
Your argument also denies the immediacy of the benefits. If Elmer gets food stamps and his family can eat, that's a far more immediate need addressed than thurston getting another yacht. It speaks to how wealthy we as a nation are when basic human requirements get downgraded to be less valuable than wants.