Using your analogy, the improvement in curry would have more likely occurred by the exposure in Trip Advisor and not necessarily by a change in management by itself. The present St Mirren management were in place over a year before this illegality was exposed in the press and they failed to respond when asked to do so (The Herald).
Historically, unskilled and low-skilled workers have always tended to be ignored and over-looked throughout industry and this is proven by the introduction of income legislation namely, the National Minimum Wage Act in 1998.