Do we need to collect school fees?

I wonder why the Government still want to collect school fees, or the supplementary fees and second tier fees, when the amounts are quite small. See this webpage for details of these fees. It causes a lot of administrative work for the teachers and the schools and for the parents. Some students from poor families are not able to pay the fees and they have to be detained in school at the end of the term, until the parents pay the fees. Is it really useful to create this type of work and stress?

I am referring to the fees for primary and secondary education. Perhaps, the fees can be collected for post-secondary education, but should be waived at the lower levels.