The Wealthy, even though they may carry a particularly heavy burden of financing social expenditure through taxes, do not make up for the whole society. But as far as justice is concerned, I believe one must take into account the actions of a particular individual that led to whatever the circumstances may be. That particular individual does bear primary responsibility over their own circumstances in most if not almost all cases, I think, and it should not be the case that those who are better off are automatically obligated to finance the difference between their means and lifestyle.
From a "fairness" point of view, I certainly can't argue that a person must suffer the results of his or her (in)actions. People who continue to make unwise choices should have incentive to improve. However, this line of thinking is entirely inapplicable if everyone is not offered the same set of choices. If I slide my front-wheel drive car into a Minnesota* ditch during Snowmageddon, you could certainly retort, "Stupid Minnesotan should have known better and gotten something with all-wheel drive, then this wouldn't have happened." However true that might be, if I had only managed to save up $2000 by the time I purchased that vehicle, that 4x4 choice would not have been available for me, no matter how much I personally may have
wanted to do what made more sense.
From a "for the benefit of Society as a whole" point of view, it strikes me as irresponsible that
every human is not receiving some minimum base level of quality of life, if not through the actions of Government, then through social pressure or even outright generosity. As I
mentioned previously, there are times when the need to sacrifice sufficient resources and time merely in order to accumulate enough money to survive has the (presumably) unintended side effect of smothering the ability for an individual to really make a difference under his/her own power. I don't believe that those who are better off are automatically obligated to finance the difference between
their lifestyle and that of the disadvantaged, instead I believe they are obligated to finance the difference at least up to
sufficiency. The Wealthy can go on being wealthy, I'm sure they've earned it, but they should never be able (or allowed!) to sit idly by atop their stockpiles while people go unfed, unclothed, unsheltered, etc. This sort of willful ignorance/turning a blind eye is flat out reprehensible, in my opinion. As you yourself say:
Short of what is required for subsistance, the government could put those tax dollars/euros/whatever into roads, schools, hospitals, or other things that actually improve society.
Why does a government get some sort of guaranteed subsistence stipend but not extend that same privilege to its constituents? Shouldn't the health and welfare of its constituents be any successful government's first priority? Why would you not make sure your foundation is sound before trying to build anything atop it? Why do so many decisions made by an entity (person/business/government) always seem to be driven primarily by how they will affect himself/itself rather than how they will effect
everybody?
I would love to go on, but my designated meal period is over, and I must return to work.
--Patrick
*I do not actually live in Minnesota. Just work with me, here.