It's almost inarguable that a McCain presidency will push policies leading to an increase in illness and homelessness. Last year, McCain voted against expanding S-CHIP, which would have extended pubic health insurance to millions of currently uninsured children. Many of those children will become sicker than they would have if they'd been able to access a doctor early in their illness. Some may well die. In 1995, McCain voted for a GOP plan to balance the budget by cutting Medicaid by $182 billion over 10 years. Many adults would have been tossed off the rolls, been incapable of accessing a doctor, and fallen ill, or even died as unchecked hypertension led to cardiac arrest or a small lump grew into a full-body cancer. You can find similar examples of McCain trying to chop apart the safety net in almost every year of voting since.
There's a tendency to want to sugarcoat the outcomes of elections. You can say you disagree with McCain's policies because universal health care is important and humane and social programs are just and decent and upper-crust tax cuts are regressive and shameful and he's on the other side of all those opinions. What you're not supposed to say is that if John McCain is elected, the policies he has signaled he will pursue will harm the country's health, defund its safety net, lead to untreated illnesses, reduce mitigation of the ravages of poverty, and, in many cases, the outcome will be sickness and death and homelessness and, for those cut off from health coverage and help, probably hopelessness, too. McCain, for his part, would argue that even so, tax cuts are a matter of fairness and it's more important that health insurance is primarily private than that health insurance is actually accessible. And fair enough. But no reason we should ignore the implications of that philosophy.
It's easy to forget the real human cost of the right's political philosophies. They have a rationalization for everything -- progressive taxation is a priori immoral, higher taxes will kill the economy, universal health care will kill the economy, etc. -- but when you put their rationalizations on one side of the scale and the reality of those who will suffer as a direct and inevitable result of their policies, you've got to be awfully confident in the rationalizations for it to balance out.
When they make predictions that fly in the face of experience -- such as the claim that returning the tax code to Clinton's levels will kill the economy -- you really have to question their calculus.