To be involved in the economy is to be materially implicated in corruption, destruction, and any number of evils. There are no morally pure enterprises. Follow the money long enough and you will find the corruption.
There is no standpoint of purity. What you can do, however, is keep your conscience alive. You will still be implicated in evil, but you will at least face the fact and do what you can. While it will never feel like enough, it’s better to struggle than to become one of the herd animals.