Nothing new under The Son

I've been thinking a lot about free and fair trade, social justice and commercial manipulation lately. So one of today's readings seemed timely:

Listen to this, you who trample on the needy
and try to suppress the poor people of the country,
you who say, 'When will the new moon be over
so that we can sell our corn,
and sabbath, so that we can market our wheat?
Then by lowering the bushel, raising the shekel,
by swindling and tampering with the scales,
we can buy up the poor for money,
and the needy for a pair of sandals,
and get a price even for the sweepings of the wheat.'
The Lord swears it by the pride of Jacob,
'Never will I forget a single thing you have done.'
-Amos 8:4-7

So, some things haven't changed much then. When will we learn?