What percentage of Americans can afford to spend $625 a month for health insurance for one person?

[Kiran C]

How old are you? If you are in 60s, there is the expected price before the tax credit. After 64, you are covered by Medicare. If you are in 40, the expected is around $270 a month.

User the calculator to get the price you may pay for Obamacare.
http://kff.org/interactive/subsidy-calculator/

EDIT
The prices that I quoted are before tax credits. Also, unless you make more than $200,000, you will not pay extra in taxes for Obamacare. Because of tax increases and spending offsets, the new law will reduce the deficit over the next ten and twenty years.

What is wrong with paying someone's coverage? When I pay taxes I pay for someone's coverage at the VA. When I pay the payroll taxes, I pay for someone's coverage who is either old or poor. Even a free market economist like Friedrich Hayek in "The Road To Serfdom" believed taxpayers must pay for someone's coverage:

"Nor is there any reason why the state should not assist the individuals in providing for those common hazards of life against which, because of their uncertainty, few individuals can make adequate provision. Where, as in the case of sickness and accident, neither the desire to avoid such calamities nor the efforts to overcome their consequences are as a rule weakened by the provision of assistance – where, in short, we deal with genuinely insurable risks – the case for the state’s helping to organize a comprehensive system of social insurance is very strong … Wherever communal action can mitigate disasters against which the individual can neither attempt to guard himself nor make the provision for the consequences, such communal action should undoubtedly be taken."