Many parents encourage their children to study well by giving extra pocket money for each good mark (сочинение плиз)

Many parents encourage their children to study well by giving extra pocket money for each good mark. Is it correct to do so? There are different opinions on this problem. Let’s discuss some of them.
Some people think that this is the only way to encourage their children because to study is boring and difficult. Children have different subjects at school. Some of them such as maths and chemistry are very difficult. Some of them like geography and biology are boring. Children work at school all the morning and when they come home they must prepare their homework. So they work almost all day. Perhaps, many parents think that if they are given money for their work, why not to give money to the children for their work? They think the money will make their children to study better because they would like to have money for sweets and different games. Otherwise the children save the money for games not eating breakfast at school.
Unfortunately, this is not true. Firstly, children get used to study only if they are given money. So, their marks become worse and worse if parents can’t give them money every day. Secondly, if there are many children in the family, it’s impossible to give them all money for every good mark when they start going to school. Thirdly, children must study well not for the sake of money but because it’s interesting and because the good knowledge will help them to make a career and to find an interesting work they like.
As for me, I wouldn’t give extra pocket money for each good mark to my children. My parents sometimes gave me money for good marks and it didn’t make me work better. But, I think, it’s right to give children extra pocket money on holidays or when they ask for it. Otherwise they will find different ways to find the money they need themselves