Buckle shoes don't do anything to forward Scottish independence...they are just associated (for Scots) with aspirations for Scottish independence simply because during the time period of Jacobite uprisings the buckle shoe was the shoe that was worn. It was the men's fashion throughout the 18th and very early 19th century. It was buckle shoes or barefoot at Culloden.

There's really no other style of shoe that can be said to have similar associations. Especially not with a kilt.

In my opinion...YMMV