Why is it so difficult to change the text of a button in jQuery Mobile?

Why is it so difficult to change the text of a button in jQuery Mobile?

There should be a possibility to easily change the text of a button using jQuery for jQuery Mobile input type="button". Something like:

$("#button").button("option", "value", "New Text");

This command is valid, but it does not change the text on the button. It only changes the value, but without any effect or sense...