It's pretty basic. At this point in time we can see what the promise of trickle down economics was, and we can see where the country is, compared to before, for the middle and lower classes. Even without blaming capitalism for this, we can see that giving wealth to the top fails more people than just paying people a decent wage.

The people claiming most to be pro-capitalist between the major two parties in the US are saying to stay the course and go even further.

I would like a return towards the capitalism of the 1950's-1970's. But that is generally considered to be socialist by the party seeking to keep going in the direction that has failed most Americans.

I would also like to emulate the whole of Western Europe in hopes of having a larger middle class as a by product of tax collection and spending, rather than paying for-profit entities, to get guaranteed services that support basic daily life. Capitalists do not want that because they cannot profit off of services provided by the government to anywhere near the same extent.

It's simple, the type and level of capitalism currently in place in America makes life unnecessarily difficult for the citizens of America.