Now if you are in a high trust society, you may have a lot of leveraged businesses or governments who have gotten loans or permission to do something based on past trust history. If the trust degrades systematically Investors may want returns faster, or interest rates go up, or partnerships don’t happen. That’s why low trust places don’t grow as fast - trust is the oil for growth engines and lack of it is sand for the same.
Corruption also does a lot of small-profit-for-the-corrupt that leads to massive damage to the overall society via second and third order effects. (example: someone stealing copper cables that stop electricity to entire cities for a while).
Look at how business works in the rich west works. Everything is formalized with contracts, risk is portioned out and offloaded to every party under the sun. You bring in people with licenses and accreditation, 3rd party consultants, etc, etc. All of this work and expense is incurred so that if things go wrong then the parties all have precisely defined ways in which they can (expensively) drag the matter through a courtroom and whatever comes of that will be enforced with state violence.
Contrast with (certain parts of) the far east and eastern europe. The west is the low trust environment.