Cheap labor is not really the thing people think it is, there are a lot of studies in econ we had to go over in class; the main reason businesses go under is bad management making poor decisions. There is a whole life cycle:
https://www.investopedia.com/terms/l/lifecycle.asp
I'm not sure what you mean. In the context of your post, what do people think cheap labor is, and what is it really? Are we talking about businesses going under, or profitable businesses becoming more profitable by reducing labor costs?
A business which is competently managed would benefit from lower labor costs and yield greater profits than an identical business equally competently managed that has higher labor costs.
In a Traveller context, there are plenty of worlds with conditions ripe for worker exploitation and low labor costs. Worlds are isolated, it's very expensive for people to move to another world and start new lives there, and there's no legal protection except the Imperial prohibition of slavery. Many worlds are captive markets and captive labor pools. Free traders could have many adventures running offworld goods to local populations outside of starport and planetary government control, and exporting local goods for better prices and shipping rates.
Do individual Imperial worlds have the right to control who enters and leaves their world? The Imperium doesn't tolerate barriers to interstellar trade, but is the movement of people considered trade? Can planetary authorities regulate the entry of non-inhabitants? Then again, the Imperium is a government of men not laws, so the subsector duke can simply say something like labor is capital, capital is part of trade, so no planetary government has the right to interfere with the free movement of labor. That's when the megacorp brings in its scab labor and prisoner of war labor in giant troop transports and locks out local labor for having the nerve to protest subsistence wages and company store debt. Even if the local population revolts, money changes hands, nods are given, and mercenaries arrive soon after to
crush all those who dare raise their hand against the company, the shitty poors restore order. Should order not be restored and production not resume, that's when the
Sardaukar ducal huscarls show up, pound the plebs into submission, and set them to work as prison labor in factories where they were once subsistence workers. Why? Because nobody does business without crossing the nobility's palm with silver, that's why. When production doesn't resume, silver doesn't cross noble palms, and when silver doesn't cross noble palms, Lady Countess' beaked monkey gets upset, and when Lady Countess' beaked monkey gets upset, people die.
It's dystopian, as I mentioned in this post
https://forum.mongoosepublishing.com/threads/tariffs-and-you-mongoose-edition.125400/post-998931
Through the continuing discussion in this thread, posters' ideas and comments begin to fill out and add depth to that quote from Classic Traveller. That's one thing I like about Traveller discussions, especially on this forum. There are a lot of people who have great professional and academic experience, and a lot of logical thinkers, which leads to very interesting and frequently enlightening discussions.