Unfortunately, I don't think that's true. Here's some US data I found with one quick search.
To add to that, as underdeveloped areas become more modern and income levels increase, it tends to follow that meat consumption increases along with it.
I imagine costs would be the main thing driving down consumption if anything. Until we subsidize alternatives like we do meat, and the prices of meat alternatives are cheaper, people will have incentives to eat real meat.
It would cost us less to subsidize them long term, and it would lower costs of meat... And help the environment. Wins all around, yet people will vote blindly against it.
I love eating beef and whatnot, but my body seems to respond better to eating less of that in a given sitting. As someone growing up in the 80s, it seemed like that diet should be a 50/50 mix of beef and spinach...
I think they are going to have a hard time convincing people to feel crummier... it's much healthier and cheaper to stick to that old "pack of playing card portion"