We are all grown adults here and there is no need to point out that those earnings are not justified by a relatively higher 'sacrifice' or work. Being poor is a high sacrifice enough.
Of course not; being poor is a condition, it is not a sacrifice. It holds no merit as a condition. You cannot use your lack of capital as a bargaining chip at the table. It is not a sign of your deserving more money. If you work hard and do something good for me, that I am willing to pay for, then you deserve money.
Capitalism is altruistic. It functions when people do good, valuable things for each other and establish trust that payment will be provided for that value. It has nothing to do with your status as poor.
Like selling addictive opioids, scam affiliate marketing subscriptions, atmosphere-ruining fossil fuels, attention-destroying social media sites (often targeted at children!), society-destroying social media bots, arcane financial products whose only purpose is to shield immense wealth from taxes or regulation, etc. etc.
Yeah, capitalism sure is great, ain't it.
Moreover, with the amount of ecological damage (mass, irreversible extinctions, global warming), indigenous genocide, slavery, etc. I'm not sure if being anti-capitalist is as "insane" as you put it. Global capitalism has given us advances in medicine, culture, reduced warfare, material wealth—but these advances haven't come without significant costs. Depending on what you value, capitalism could end up being a net-negative system.