If a corporation is doing something too unpopular then people don’t work for them and they cease to exist.

Unfortunately, this is not generally the case. In the US, for example, the corporation merely engages in legalized bribery to ensure that people are dependent upon it (ex. limiting healthcare access, erosion of social safety nets) and don't have a choice but to work for them or die. Disproportionate distribution of wealth may not by itself be a violation of social contact but if gives the wealthy extreme leverage to use in coercing those who are not wealthy and further eroding protections against bad actors. This has been shown historically to be a self-reinforcing cycle that requires that the wealthy be forced to stop.