Basically, you've got two camps here: one are the parents (DMs), who can see that giving access to everything a child ever wants will spoil the child (which is bad in the long run) and then there are the children (players) who want everything they ask for.
The buying of magic items undermines the treasure seeking route of adventuring. The game is built around adventuring as the core reason for people playing D&D instead of one of a multitude of games.
Therefore, giving players anything they ask for will spoil them and, in the end, ruin the game for everyone. Just don't expect most players to see that far ahead. All they see is 'magic items, I want, I want!'.
The buying of magic items undermines the treasure seeking route of adventuring. The game is built around adventuring as the core reason for people playing D&D instead of one of a multitude of games.
Therefore, giving players anything they ask for will spoil them and, in the end, ruin the game for everyone. Just don't expect most players to see that far ahead. All they see is 'magic items, I want, I want!'.