Your source is from 2007. I don't have that particular figure; but in 2019, the bottom 50% of the wealth distribution continue to own almost nothing, the top 10% of the wealth distribution own 71% of all assets and the middle 40% own about 28% [1].
> A strong majority of Americans get more money from the government than they put in
This is literally the point of taxes: to redistribute resources.
> (b) own assets
See above, but ownership of assets is distributed incredibly unequally.
> (c) route discretionary income to consumption over asset accumulation
This argument that poor people remain poor because they make bad choices (formally called "culture of poverty") has been heavily criticized. Most economists and sociologists now reject it and have done so for over 30 years.
[1] https://wid.world/share/#0/countrytimeseries/shweal_p50p90_z...