The human society started hunting animals and eating them thousands of years ago.
Over the course of thousands of years, they got used to meat so much that its hard to imagine living without it.
Some people who turn vegetarian have before that spent decade or two eating meat.
This makes it harder to be vegetarian.
Something that their ancestors ate for thousands of years and something that they ate for decades is no longer there. Hence, they feel the lack of it.
It is like with smoking. If you never smoked, there is no urge for you to smoke. But if you did smoke, the urge is there calling you to smoke more and more.
The problem of capitalism is consumerism. Capitalism makes people work hard, thus people feel the need to reward themselves and buy themselves expensive stuff being readily offered by capitalism. Hence, the wage is always insufficient.
Of course, with meat getting more and more expensive that could be an additional motivation to abandon meat and get over the lust for it.
