Media Updates, page-13421

That's a bit draconian but there is another approach that could achieve a similar objective.

From memory the rank and file A2M employees have access to an incentive scheme where if they purchase shares (up to a small amount, I think it was 2,000 shares or something) then the company would match that by purchasing the same amount for them. The condition was they needed to hold those shares for a certain duration, it may have been 12 months.

I see no reason why they could not apply a similar approach at a larger scale for the higher-ups. It's not forcing them to purchase but it is also not giving away shares for free and creates the same vested interest in SP gains.