As others have said or implied, the OP's question is itself incorrect. The actual question is about how to get management to buy in.
Have your management read the relevant sections of the following: (1) Steve McConnell's Code Complete, (2) Chris Sterling's Managing Technical Debt.
If management can't or won't learn these lessons, then I can't emphasize enough how correct the P, GP, and OP posts in this thread are.
There are many ways to have management terminated or shoved aside. Go to the targeted manager(s)' boss(es). Or go to the boss(es)' boss(es)' boss(es), etc. Go the board of directors. Go to the investors. Or if management has engaged in illegal activity, report them to the proper authorities, etc. However the OP goes about having his management terminated, he is morally required to do it for the long term benefit of the investors. The investors' long term interests must come first.
The Tao is like a glob pattern: used but never used up. It is like the extern void: filled with infinite possibilities.