tendency to form collusive ties; predisposition to cozy relationships
Used in political, bureaucratic, or business contexts to describe a structural inclination toward improper, mutually beneficial relationships. Often carries a critical tone.
The industry's tendency to form collusive ties has become a problem.
There are strong voices criticizing the cozy relationships between politicians and bureaucrats.
癒着 refers to the collusive relationship itself, while 癒着体質 describes the systemic tendency or predisposition toward such relationships.
Compound of 癒着 (ゆちゃく, 'adhesion; collusion') and 体質 (たいしつ, 'constitution; predisposition'). The figurative use of 癒着 for improper ties is well-established in modern Japanese.