Yes you absolutely can blame them for it. This type of shift (and a million other possible permutations) is why we invented the concept of "charters" around the same time we invented writing.
The entire point of the pre-commitment device is because you (or other stakeholders) are anticipating that your thinking will get distorted over time. If you could be trusted to make such a decision in the future then you wouldn't have written a charter to bind yourself.
It’s like joining a non profit trying to protect the rain forest and then finding gold. They say screw the forest let’s mine gold now. Do the original employees then stay. Same here. Greed infected them all
The entire point of the pre-commitment device is because you (or other stakeholders) are anticipating that your thinking will get distorted over time. If you could be trusted to make such a decision in the future then you wouldn't have written a charter to bind yourself.