Whose fault to hold a Teacher Appreciation Banquet in the kindergarten?

Teacher Appreciation Banquet in the past was not a banquet, just simply treat teachers to have a meal with sincerely thankful feelings, but without any comparison and showing off. It's a nature expression.

However nowadays, Teacher Appreciation Banquet becomes a popular practice, graduates in senior high schools, Universities, and elementary schools, even kindergartens that they all hold a banquet. A householder with a six-year-old child said that, his child will be going to graduate from kindergarten. Some householders made an uproar to hold a “Teacher Appreciation Banquet”. Eventually, each householder paid 200 dollars, brought his child to dine together in a restaurant. During meal, children hold the drinks and toasted to their teachers. When leaving, they sent the present to the teachers all together. Kindergartens hold a Teacher Appreciation Banquet that is not only the individual phenomenon for classes but also for schools. Plus, some restaurateurs are inured to the unusual. The younger the child is, the more money parents are willing to spend. According to the report, in elementary schools' graduation, parents only treat teachers in a higher-level-restaurant. And the cheaper ones still cost 400~500 dollars. The minimum price for a high-level-restaurant is over 800 dollars, even 2,000, or 3,000 per table. Even more, no highest prices limited for some restaurants that list superlative recipe, etc. like sea-ear this kind of slap-upfood in the menu.

Is it necessary to hold Teacher Appreciation Banquet greatly in kindergartens from so young age? Whose fault to make such the situation?