There's Water On Mars...Now What?

So I'm sure most have found out through your regular news source that NASA scientists have confirmed the existence of water on mars, at least in ice form. And I'm sure that this discovery, in tandem with the deteriorating state of our earth's environment, the massive increase in overall climate, and the general rising costs of living due to the rising costs of gas and the unsustainable food sources for an accelerating global population, potentially opens up a whole new place for the residents of Earth.

Several newsmakers and documentarians have already noted the similarities of Mars to Earth over the years. Stephen Hawking has even been quoted that Earth will no longer be habitable in the next 100 years. Due to our addiction to excess, greed and corpocracy, we'll have to search for a new home for our 6.8 billion residents (a number that will reach 10 billion by 2025).

Sure, there's plenty to be done before any of us can start living there. We’ll definitely have to start heating up the planet (since current conditions only allow for the sublimation of H2O ice to form H2O gas and the general climate hovers around roughly -26*F). We could achieve this goal via a scattering of bacteria on the planet’s surface that will produce CO2 from the basic chemical components already present, and maybe some smart scientists would decide to sequester our own carbon emissions in a giant vat and send it hurdling in space toward the ice planet, which would explode on impact sending carbon dioxide throughout Mars‘ atmosphere--both plausible methods that would heat up Mars until it reaches a habitable climate. From then on, it's just positioning certain ecosystem capable of CO2 absorption and O2 production ultimately concocting the perfect potion we humans need to breath: air.

Assumption: We Can Now Live On Mars.

Let's assume now that it has taken Earth's scientists approximately 67 years to heat up and oxygenate Mars, and for sake of argument, that in the year 2075 AD Mars is now habitable.

By this time probably 10,000 scientists have already traveled to Mars and back, set up several silos full of food, created a whole new set of rules and designed the perfect colony for the human race. There would anything and everything would could ever desire. Every action would now be sustainable and each individual and corporation would be fully accountable for their actions.

Just think, a whole new planet for the human race to start over.

We could forget every petty war we’ve ever started for limited resources. Abandon every religion we’ve initiated because we couldn’t see the advantage to treating others with complete dignity as a fellow human being. Try, at least, to put behind our minute differences in culture, race, language, and gender. And pursue a higher order of living, one that is fixated on sustainability.

Question: Who gets to go?

It would be naive to think that the United States, or even a conglomeration of every space-faring nation, would have the capabilities (or even the resources) to transport billions people to Mars over short period of time). Indeed, Mars' technology and predominantly uncharted landscape by then may only be able to support the lives of a fraction of the Earth’s total population.

Would there be regulations prohibiting those without much education, the insolvent, or those with a history of criminal activity? How about rules preventing the passage of the old, weak, or unhealthy from journeying to the new Eden?
I chose 2075 AD not only because it sounds like nice rounded-off number but because I would be 90 years of age by then. With 10 years to go before I would become a centarian, would I be fit to go to Mars?
Mars: Our new home?