"Those traditional benefits, which vary widely between states, replaced about 40% of one’s prior wages, according to a national average cited by the House Ways and Means Committee.

The measure’s improved $600-a-week payments, which run through July, aim to boost that wage replacement rate to 100% for the average worker."

In other words, this is a very temporary measure due to the current crisis, and those on unemployment will be making far less than they would by working in a few months. A short-term duct tape measure to stop the bleeding isn't security.