The Economic Policy Institute has published information revealing the extent to which middle class working families have lost economic ground since the turn of the millenium.
When adjusted for inflation, median salaries have fallen by $2,000, while the average output per hour has increased by 18%. And these figures don't include the skyrocketing inflation numbers for 2008. When 2008 is added on, the line on the chart will look like it has fallen off a cliff.
If trickle down economics makes any sense (and I'm not sure that it does), it only makes sense when the people in charge are honest and conscientious. When crooks and thieves are in charge, the working classes get robbed.