I absolutely disagree with this opinion and believe that students at schools do not have to wear special uniforms in any country, because it can be expensive for parents and uncomfortable for children.
Many adults are sure about the necessity of school uniforms, but special school clothes could not help students to study hard. On the contrary, it can be uncomfortable to wear the same business type of clothing and scoolchildren could not concentrate on the lessons. For example, students in the USA have no uniform and they can wear anything they like. So children there feel free about that and wearing jeans at school does not hinder them from studying. It shows that education does not include types of uniforms and their necessity.
At the same time, the other half of adults does not support the idea of enforcing uniforms, only because it is expensive for some families. For instance, poor families cannot pay the same cost as others for a unique school uniform for their kid, and especially, when it is a large family with more than 2 kids. Also, it can be hard to be careful with only one instance of clothing for school. That is why uniforms are something impossible for some students.
To conclude, I strongly believe that unique uniforms are unnecessary for schools, because they do not prove student’s knowledge or help them in studying and can be a problem for poor families.