Logically, Plan B will work better. Because when you yourself supply money to your child, he will not know about the amount of work that needs to be done to earn money. Due to which he will never be literate to work hard. And when you stop supplying money, a financial deficiency will appear in him and that is why he will work hard and earn money due to his need. And at that time, of course, you will get a better result than him. So I will support Plan B. Plan A can also work, but its chances will be very less.
In fact, Plan B isn't perfect either. Your children can earn money, but if they don't know how to manage and spend it wisely, no matter how much money they earn, it will never be enough. That is why many people work hard, earn a lot of money but do not know how to manage their finances, spend lavishly, without control, making it impossible for them to have a stable life.
In life, to ensure a stable life, we not only need to know how to make money but also need to know how to manage finances to bring results. So don't just use one of the two, combine both to teach your child to become a child who knows how to earn money and manage finances effectively.