A marriage with lawlessness?

The sermon at church yesterday was on 2 Corinthians 6, and wrestled with the application of the verses:

4 Do not be unequally yoked with unbelievers. For what partnership has righteousness with lawlessness? Or what fellowship has light with darkness? ¹⁵ What accord has Christ with Belial? Or what portion does a believer share with an unbeliever? ¹⁶What agreement has the temple of God with idols?

I think important and difficult applications that I need to wrestle with as a Christian are:

To what extent to I accept my investments (including superannuation) being placed in companies which exploit workers, produce immoral products, or perform acts that I personally believe are wrong? (see here for more discussion)

How much effort do I make to buy products that have been produced in a just manner, where workers are paid fair wages? (see here)

What level of financial debt is acceptable? When do I become a slave to debt?