I read your article, it was quite interesting
However, I do not agree with the following points:
"It appears that capitalists are greedier and care about what is better for himself or herself than everybody as a whole."

There are tons of examples from Andrew Carnegie to the widow of McDonald, who gave away millions of dollars in education, health, and other public sectors to date.

Secondly, you wrote that minimum wage is not fixed in capitalism. This statement is out dated because in modern capitalistic economies minimum wages are fixed.

You also implied that in capitilistic economies the working conditions of labors are in shambles.

This is not the case, since there are many agencies from OSHA (work place saftety commision) to UEEOC (The U.S. Equal Employment Opportunity Commission), which actively participate for the welfare of workers.