Dont blame management!
safety culture in any organisation is complex and influenced by a wide range of factors. Poor culture is not just "management" willfully demanding that young pilots fly overweight aircraft or exceed duty hours. Culture is also incedibly hard to change and although the overall resposnsibilty will rest with company management to identify and fix the adverse or serious issues, sometimes issues are deliberately disguised or not reported by these same pilots who complain about the poor safety in GA.
I used to worked for a company in the NT that had a bunch of pilots who whacked on constantly about the poor safety culture in GA and these were the very same guys who would turn up to work hungover, ignore basic company SOPs because they didnt agree with them, go formation flying on scenics, carry 13 pax (kids) into communities in 6 seat planes and go off low flying at every opportunity. That was seen by them as some sort of "rite of honour" as a GA bush pilot when it suited them but they were first to whinge about things if they ended up doing something borderline unsafe when it didn't suit them. That was somehow different and was always managements fault!
When every GA pilot starts acting in a totally professional manner when they are all alone out in the bush and noone is watching them is when you will see a signifcant change in GA safety.
Safety culture has to involve everyones best intentions or it's a pointless discussion. Managers cant always fix stupidity!