What is one way in which democracy was still restricted?

It's still benefited mostly the upper class citizens.

Explanation:

The current system of democracy allow the citizens to buy influence within the government by using their wealth.  They did this by donating in Political Action Committee that help a certain candidate win the election.

Because of this, The Rich and Powerful people have more chance to influence the government by electing the candidate that will pass a set of legislation that will benefit them. The poor citizens are not capable to give such donation

b) to encourage free trade