The police, the prison system and the army are all on hand to make sure that we do obey. There are other organisations which mirror this top-down structure, but the state stands apart in its claim to be the ultimate authority, and in its readiness to use force to back up that claim. Political parties need funding from business to get into power, as well as support from the media, owned in turn by rich businessmen. Even after the election governments need some degree of support from business to survive. For example, when a Labour government, by no means revolutionary, was elected in Britain in the 1974, there was a massive outflow of capital from the country, which weakened that government considerably.
Some governments are even worse.
Sometimes businessmen just get too greedy, or the public get too angry about the cosy relationship that exists between politicians and businessmen, so an example is made of someone, to 'prove' that there isn't one law for the rich and another for the rest of us. Meanwhile the Larry Goodmans and his pals carry on ripping us off with the government's approval. Very occasionally the government will pass laws which appear to run counter to the interests of the rich, the most commonly cited example being the establishment of the social welfare system, which cost money that could otherwise have been used to 'support business'. But the welfare system wasn't created as an act of generosity, or as the first instalment in repaying us what we are owed. It was a response to rising militancy and higher expectations in the working class.