Am I evil??

So im 26. Im still working my way in life. I have 3 half sisters from my biological mom and 4 brothers. All of them are having difficulty in life. One married too early and got a kid. She cant find a job cause in my country. They have high standards like atleast achieving 3rd year college before you get a job. Her husband works in the grocery store. He is a stacker for food products and they dont earn much. I am able to afford things i want cause i decided not to have a child and i worked really hard for my job. I didnt settle for the minimum wage. I got rejected so many times but i didnt give up until a company stepped up to my salary expectation. I earn more than double of the daily rate of employees in my country. Im grateful for it. I worked hard for it. I got a job as a customer service. Online tutor. Back office worker before i received the job and salary i want. Now the problem is my half brothers and sister. We have a culture.if you are the eldest which i am. You must help them cause that is your purpose as said by elders. If you abandon your responsibility you are considered trash of society. Am i selfish for not wanting to do this responsibility?? I moved in a different city. I feel im slowly dying. Like was i born to work and work and work so i can give away my hard earned money??? Am i selfish??? Im still in the point in my life where i moved to an apartment and im still buying things. Before when i was still helping them. I want to buy at the thrift store new shirt for myself but then i think the money should just be given to my half brothers and sisters.