For better or worse it's harder to do that in the States because the two parties are (or at least were) not all of the same cloth. That the Republican/Democratic party of Alabama were not the same thing (nor did they advocate the same positions) as the Republican/Democratic party of California. Add to that an increasing marginalization of the Republicans to a rural, Southern rump party, one that does not have a national following and does not command a national presence. It become pretty obvious that the 'Pubs have all but abandoned the urban vote and urban areas, and with that - the majority of the population, and there are now many areas of the country where the Republican brand is non-existent, or when someone does run on it, has little to no meaning to the national positions. That's allowed the Dems to move to a center-right position (the last Democratic Convention sounded pretty much like Republican Conventions sounded in the old days, though it didn't look nearly as 'all-white'), as the 'Pubs move ever further to an extreme right, and leaves the way open for some group to reclaim the progressive left, and advocate for those positions. But I don't see that happening soon.
And I'm not even sure what you are asking - but if you are bitching about the regulation of business and the development of the modern welfare state rest assured that both were the direct result of the Industrial Capitalistic system, and not the Socialist system. The biggest proponents of regulation are, in fact, the biggest players in that niche. The initial bout of American governmental regulation of business (the railroads) was undertaken with the complete support of the biggest railroads who saw it as a way to rationalize their operations, lessen competition and drive marginal operators out of the business entirely. Which is exactly what happened. Make no mistake about it, the end result of unfettered free market capitalism is not increased competition, but no competition. (Because competition is wasteful, and the best way always wins out over all the other ways.)