I believe it is a difficult to avoid byproduct of a competitive society (so basicly all). Contractors/suppliers compete with lower price that need to be balanced some way, employees compete with their willingness to work cheaper or more to have any kind of income at all sometimes. Some do it for greed only, employee and employer alike. I know someone, well paid construction engineer, who was willing to get into a shady situation so both his employee and himself can save on taxes, sharing financial gain of pretending non-employment relationship. This involved payment in bulk for months of work which at a financial downturn ended up in not getting paid - along multitude of exuses and promises - loosing almost 2 years of work worth of money for the engineer and the need to find someone else to work for in a desperate time risking the livelyhood of his family. Meanwhile his previous 'partner' in crime of course fluorished instead of sharing the loss too after the benefits. The engineer had no means to do anything being an accomplice for long, both dependent on the partner's payment but without any small means to put pressure on them. Exposed completely.
It is too easy to be smartass about someone else's life and situation but since individual employees are always more fragile than organizations the best to avoid extreme competition advantages like above and have reserves for situations when an organization stops paying - e.g. being on the brink of collapse - so one can have better position of pressuring by not working until payment arrives in parallel of looking for other possibilities in case the likely eventuality of loosing job comes.
Of course this is what is almost impossible to achive for most, especially for the most vulnerable: there will always someone to take the place of 'troublesome' employees, sometimes for less or offering more. As a product of desperation (in lack of reserves and possibilities but the need of buying food for the family). Shady figures exploit this. Unity against exploitation would help but we rather compete to raise above others.