[damowangcy]

By handing in your resignation letter.

But seriously though, you might want to reconsider the choice. If you're in the management long enough, you'll realize that sometimes it's not just about doing the right thing, it's doing the thing that benefits you the most. Only by doing so, you gain power to control what you want. Even then, you'll realize that doing the right thing might not be your best option. Your job as a management is to ensure the group of people you manage is capable of accomplishing the task required by the company, not doing the right things you want.

Don't get me wrong, you can make your stand sounded, no, you should and must. However, after that you also need to take actions that could resolve the issue at hand, not just stop there, else you'll become the crybaby who is full of ideals yet never accomplish anything.

If you couldn't accept where the company is headed, trust me no amount of effort is worth to make it right, just look for a new job, you'll end up happier.