Incomes have declined in the past 10 years (see below for 25 years data). The median income of families is now just under $50,000/year. That means half of American families live on less than $50,000 and the great majority on not much more than that. This from the Daily Kos.
Yet Ryan in his budget proposal wants to balance the budget by increasing taxes on this group (those with incomes under $50,000) while decreasing taxes on those whose incomes and wealth have increased dramatically in this era (incomes over $125,000)