You don't see a problem because you actually have a subscription to these journals -- via your university. During the school year most of the time I have the same experience -- all articles are freely available when I sit in a library or in my room in students' dormitory. Then the summer holidays come, and bam, my head hits the paywall. It annoys me like hell.

The prices are so ridiculously high because they're not aimed at the single consumers -- they're aimed at the universities, which are (barely but still) able afford that.