You can see this in rusia where after 1990 communism has been replaced by big money government, not democracy. In china same thing, communism has been replaced with big money government, a capitalist economic system.
And you see the same trend in the US where a democratic government has been replaced by a big money capitalistic government, only interested in serving the needs of money making.
And without a government system making rules to minimize the negative impact of the economic system, we can see all the negative aspects of capitalism. Exploitation of humans, winner takes all.
Capitalism is winning even at the level of government, and this is what it looks like.
Just like we see the need to separate state and religion, we should also separate state from the economic model. Democracy and capitalism aren't one and the same thing. Democratic governments have multiple economic models to choose from, depending on the problem they want to solve.