Capitalism requires the blood of the workers to keep it going. The capital business owners reap most of the profits from their workers. Workers literally generate 4 or 5 times their value. The difference in the wages paid to worker and the profits made for the company is surplus value.
Workers have every right to collude with each other and demand a fairer deal from their employer and receive more reward for their efforts. Unions are a good way of organising workers and negotiating with employers on behalf of workers.
Capitalism has good points out that weigh its bad points and it is one of the only system that allows democracy/voting rights. The system works well when banks, corporations and governments act ethically and morally. However, greed, corruption and self-interest poisons the system.
