You know what? Let’s use the allowance example again to make it even clearer.
Let’s pretend we have an allowance tax bracket with a 70% tax on money received after a certain point. To keep things simple, we’ll make the limit $90.
If a kid does chores and earns $10 in allowance, they get $10. They’re not going to be affected by the 70% tax.
If a kid does chores and earns $50, they get $50. They also aren’t in the 70% tax bracket, even though they make five times as much money as the kid making $10.
If a kid does chores and earns $100 in allowance, then they’re in the allowance tax bracket with the 70% tax.
$100 minus $90 is $10. This is the part that’s going to be taxed 70%.
So the kid getting $100 in allowance will have $93 after the 70% tax takes its share.
Now, I’d never impose such a thing on actual kids. All of this is a thought exercise.
But if it were real, the kid making $10 and the kid making $50 would probably be kind of mad if the kid getting $93 was bitching about being short $7.