The dictionary definition of equitable is 'fair and impartial'. You're defining the equitability of wealth possession by the effort that an individual has put in to acquire said wealth. If that were really the case then quite clearly something has gone awry.
As an extreme example take Jeff Bezos, who in 2018 earned 315 times the annual pay of his average worker every hour. Clearly Jeff has never worked that much harder than his employees. Further, Jeff could sit back and do absolutely nothing for the rest of his life and he would still earn that much due to his position. Jeff has so much wealth that his children, and his grandchildren, and many generations of the Bezos family after them will never have to lift a finger. This is the reality of the system.
Meanwhile there are hundreds of millions of people around the world working long hours doing backbreaking work for peanuts. Their circumstance its more often than not an accident of birth, and how hard they work has very little bearing on what wealth they might accrue. Their children will be lucky not to inherit debt.
So I put it to you that your definition is hugely naive of how the world actually works. The reality is that people in positions of power take as much for themselves as they possibly can. It has always been this way.
If we're to apply notions of equitability to the debate around climate science as seen throughout these comments then one has to be mindful that a large number of incredibly wealthy individuals, the richest people in the world no less, have an awful lot to lose from a transition away from fossil fuels. The power and influence they posses is many orders of magnitude greater than that of any group of scientists.
So ask yourself, whose side are you really on?