One way to find out is to see how they vote on issues that Americans support.
A recent Gallup poll found that a majority of Americans--including both Democrats and Republicans--support closing tax loopholes on corporations or raising taxes on millionaires to help pay for things like schools, bridges, roads, etc.
And this was part of Obama's jobs plan.
Yet, so far, Congress has not acted (well, other than to vote no on every plan submitted by the President).
In this news analysis, Truthout, features the group, Patriot Millionaires for Fiscal Strength, who is calling on Congress to let the Bush tax cuts expire once and for all, and return the top marginal tax rate back to the Clinton-era levels. You know, back to when the economy was booming.
According to the National Priorities Project and Citizens for Tax Justice, the first decade of the Bush tax cuts, from 2001 to 2010, cost $955 billion; the Obama extension, from 2011 - 2012, cost $229 billion; the proposed extension, from 2013 to 2021, would cost $2.02 trillion; the total cost is $3.2 trillion.
Tax cuts for the wealthy have NOT spurred economic growth, but have instead just added trillions to the national debt. People know this, so they are calling on Congress to act.
So far, they refuse. So, it is fair to say that this is one example of law-makers NOT supporting the people.