In my opinion, I disagree that children spend money for game.
there are three reasons.
first, children have not perfect judgement yet. so they can't know whether spending money for game is positively necessary.
For example, children buy cash items in game thoughtlessly and after that if they are tired this game, they quit it.
at last children have nothing.
second, spend money for game will be bad habit.
For example, as the proverb says 3-year-old habits die hard if children spend money for game, even after growing up they do same thing and can't stop spending money for game.
third, children may commit a crime.
For example, when children want to charge cyber money but their parents are against that, children can charge cyber money in secret. If amount of money become large, children may have debt. it is same that they steal parent's money.
what is your opinion?