> In the 90s I would have considered $56,000 per year as rich.
If you look at historical income, $56k in 1995 is roughly where $100k is now, in terms of where it put you in the income distribution.
> In the 2000s it would have been upper-middle class, or "senior white collar professional"
In 2005, it's like a little under $85k today, again, by where it puts you on the income distribution, not buying power.
I think that the farther back you go, the more you are overstating what $56k was.