Isn't that the case in all of the UK? I never paid for a museum in England either anyway (other than voluntary donations). In New Zealand it's free too.

In the Netherlands it's pretty expensive, but a number of museums have a "free day" once a month.

My biggest problem is actually not so much the price, but rather the opening times, which tend to be during office hours: when people are working. I would love it if more museums would be open until 21:00 or 22:00.