Allow people over 62 but less than the age that Medicare can begin, to opt in and pay for Medicare

With the talk about raising the age for Medicare, people over 62 but between whatever age is determined (or 65 if this turns out not to be an issue) to get medicare by paying for it. This would be fairer to seniors than just cutting them off until 67 or 68. This way Medicare would add to it's "buying power" and seniors would have a proven and trusted place to go for their healthcare. Everyone would gain by this, and starting it at 62 would allow people to retire who normally wouldn't be able to afford it.