Ive looked at some (US Budget) numbers from various sources and formats for the last few years, together with some income and tax analyses for recent times.
It appears true that the top percentage of (US)income earners do pay a higher (group) contribution of overall income tax collected.....the higher the percentile, the higher the group contribution.
What is also interesting, is the view given... when the total effective (personal/family) federal taxes collected is/are applied to the same percentiles.
These (Avg.) figures for 2011...Source... 'Institute on Taxation and Economic Policy'(2012)
Low 20% Inc 13,000 Effective Tax Rate 17.4%
Next 20% Inc 24,100 21.2%
Next 20% Inc 42,000 25.2%
Next 20% Inc 48,700 28.3%
Next 10% Inc 105,000 29.5%
Next 5% Inc 143,000 30.3%
Next 4% Inc 254,000 30.4%
Top 1% Inc 1,371,000 29.0%
So, (from these figures).......it appears that the lower income earners are infact shouldering a reasonable level of 'tax' burden when compared to any other percentile..that is, unless you consider less than $11k as opposed to $973k (both after tax) as, too generous to the lower income earner.
Another source (National Bureau of Economic Research) has stated that 'most' workers are paying combined (Federal/State and Local) taxes of approx. 40% of earned wages/income.
Much of what is released in official gov budget statements (not just US), is 'smoke and mirrors'...but they still can't avoid the macro numbers and the resulting view of spending that can be formed.
Here's my (first cut) view of some spending in the US and AUS (both 2011)...expressed as percentage of Federal Gov Expenditure.
Soc.Sec/Vets/Welfare/Disability........US 40%,,,,,,,,,,,AUS 33%
Medicare/Medicaid/Other Med...........US 21%,,,,,,,,,,,AUS 16%
Defense/Military............................US 19%,,,,,,,,,,, AUS 6%
I think there is a strong relationship between the extremely wealthy income earners and the government/institutional sources that they (the most wealthy) derive much income from.
In the case of Health spending we each spend heavily in the private med insurance schemes (as individuals).....but US contributors apparently pay much higher premiums for comparative care.
Even in the absence of deep critical analysis and social assessment, it is not far fetched to say that financial interest groups/wealthier investors are depriving 'most' working people of a greater level of health care ....the care is limited by fed budget allocations/affordabilty (in the first place) and additionally limited by the cost of private insurance, as a % of income for the majority of families....
By the exhorbitant charging of products and services and the institutional protection they receive, they reduce the amount of health care $$$s available, for every individual deserving of proper and appropriate Health care.