And THIS is an excellent example of how well intentioned government decisions end up having unforseen consequences.  A new technology starts to become affordable and medicare decides to pay for it.  Shortly thereafter, companies that sell these things become adept at hawking their wares and helping those with no shame and assist them through the approval process through medicare.  As more and more of these things get sold they become ubiquitous and nobody bats an eyelash any more at seeing people who are capable of walking using them.