Perhaps you might want to watch my Tiktok videos. Systems that are more capitalist and systems that are more socialist (remember, there is no 100% socialist or capitalist system in existence) are both fuelled by taxation. You work, you get money, you give some of that money back, you save, you live.
Under more socialist systems, those who do all this ALSO get unemployment insurance, sick pay and insurance, universal healthcare, free education for themselves and their children, childcare and pay, comprehensive universal pension schemes, etc.
More socialist systems have what’s called a “minimum” standard of living, based on the principle of universal human rights. Many more capitalist systems don’t.