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).