Mrs Birling claims that 'a girl of that sort would ever refuse money', and she assumes that due to her lower class origin, she is inherently greedy. Despite this, Eva is presented as a moral force, who never take stolen money and won't marry Eric, just for his wealth. This is in contrast to Eric, who steals money, and the Birlings, who arrange Shelia's marriage for financial gain; in the name of 'lower costs and higher prices'.