He is a better negotiator than you. You could learn something here

Are you fat?

Well now your brother will get diabetes three years sooner than you. Take the win while you can.

This is your lesson for how the real world works. You are going to get compensated the absolute minimum that you are willing to work for. Obviously you were willing to work for free while your brother had a little negotiation. Learn from your brother, because every job you take from here on out will be the same. Know your worth!

Different rewards/incentives for different kids. My youngest gets a sticker for pooping on the potty while his sister is allowed to go to the playground across the street without an adult. They're only two years apart but he's autistic and she's overly mature for her age.

Your father has to love you more than your brother. Feeding that kind of stuff to your kids can only come from a deep-rooted desire to watch them die early - they are so bad for your health they've been banned from several places (New-York, for example) and don't exist outside of the USA, to my knowledge.

Yeah that's what sucks about being the older sibling.

You're better off without the 1,000 calories of pure sugar.