I went on a holiday one summer with my best friend from primary school, aged 11.
When I was invited, it wasn't a financial commitment, it was just a request to take me with them on holiday. My best friend was the loveliest girl in the world, an only child. I was the oldest of 5 kids by then. My parents had good jobs, but we weren't wealthy, as few people were back in the 1980s. With two slightly higher incomes and one child, they were significantly wealthier than us as a result.
Anyway, to cut a long story short, my parents had no idea what the expectation on them was. They gave £40 food money which in those days was a lot more than it sounds now. As well as that, I was given spending money to take with me.
The mum and dad spent almost the entire holiday grumbling about how little money my parents had given, as if we were unwanted freeloaders. They kept referencing it as a reason why the holiday was compromised compared to their usual standards. Even at 11, I was very conscious of the issue throughout the holiday, even to the extent that I started to refuse food or any offers to buy food out and about. I felt completely unwanted, ostracised and bullied.
The miserable bastards made me feel like a charity case the whole time, and it honestly scarred me for life. I was a clever, impeccably polite and well behaved child, top of the class every year at school. That shouldn't matter, but even now I feel I have to justify myself to compensate for my Oliver Twist status.
Looking back I am horrified at their behaviour. They had asked to take me on holiday as a companion for their daughter, to enhance their time together. They spent very little time with us, and spent most of their time drinking or in pubs, leaving us to entertain ourselves. They were total bastards to me, telling me off all the time for imagined misdemeanors, frowning at me, criticising etc.
Looking back, they were jealous that I had done better than their (also clever) daughter, and they were resentful of my parents for having more children than them.
But to take out their resentment on me was cruel and abusive. It left me with a huge sense of inferiority that probably have me a chip on my shoulder about being poor for life.
If you are already resentful before you go on holiday, then my suggestion is that you find a way to get over it graciously, or refund the money and say you can't take him. No-one held a gun to your head, you chose this because it got into your plans.
This boy is not a charity case, nor is he responsible for whatever resentful adult politics you have generated in your head.
To you and all the people like you who think the way revolves around you and your precious child, it doesn't.