We eradicated smallpox for everyone, without distinction between rulers and ruled. That's the difference!
a rising tide lifts all boats.
"A witty saying proves nothing." -- Voltaire
You may want to familiarize yourself with the history of smallpox eradication before continuing this debate. The vaccination was available mostly in wealthy countries first.
http://en.wikipedia.org/wiki/Smallpox#Eradication
"...coordinated efforts against smallpox went on, and the disease continued to diminish in the wealthy countries. By 1897, smallpox had largely been eliminated from the United States.[66] In Northern Europe a number of countries had eliminated smallpox by 1900, and by 1914, the incidence in most industrialized countries had decreased to comparatively low levels..."
Notwithstanding the daughter comment that disproves this, try substituting 'smallpox' for 'cancer'. Cancer treatment is by no means available to everyone, or even the majority, yet it extends lifespans (of good people and dictators alike). Should we not have developed treatments for cancer?
Not unless they're going to be benevolent rulers, no.
I will not grant people immortal life so that they can make everyone else's lives into a living hell.