Conservatives and liberals each like to say that the other is "destroying  America." I think that is a little too simplistic and rather misleading. I think  both true conservatism and true liberalism have essential roles to play in  American politics and economics and social affairs.
  
 As even most liberals will insist, conservatives primarily seek to "protect  business interests." That essential fact is true, but somehow liberals see that  as a bad thing, by definition, rather than a good thing, by definition.
  
 Ignoring  the extremists of both parties, and focusing on moderates of both sides, here is  what I view as the optimal role of liberals, true liberals, not far-left wing  extremists.
  
 We are  primarily, first, and foremost a capitalist system where the vast bulk of  economic activity is in the private sector, not government. Yes, the government  does play a significant role in the economy, but it is the private sector that  plays the dominant role. Unfortunately, liberals take that private sector role  for granted, leaving only the conservatives to defend it.
  
 The crux of  the matter is that real people need social services independent of their  absolute ability to financially afford such services at any given moment of  time. The private sector does attempt to fill that gap with products and  services such as insurance policies and credit of various sorts, as well as  encouraging households to "save for rainy days." And for many people that works  out fine, for most situations, most of the time.
  
 But, as  even most conservatives will admit, the private sector cannot service all social  needs for all households all of the time. This is where liberals and  government-provided services come into the picture, to fill the gap.
  
 Sure, some left-wing liberals still insist that government should be  responsible for 100% of social services, but the majority and moderate liberals  seem comfortable with a social safety net that is mostly the private sector with  the government filling the gaps.
  
 There is also the lingering issue that there are still plenty of little and  not so little gaps in services that are still unfilled or at least not filled in  a consistent manner. It is here that liberals have a legitimate role, but only  to the extent that they exercise due diligence in ferreting out what the proper  and sustainable respective roles of government and the private sector are on  filling those gaps. Unlike what the extremists will insist, it is not an all or  nothing question.
  
 In short, there are two roles here: 1) defending the private sector – the  conservatives do that, and 2) assuring that the private sector or government  fill in any gaps in social services – the liberals drive that side of the  equation.
  
 My main  problem with a lot of liberals and their policies is that they do a lousy job of  due diligence and assuring sustainability and focus too much on the visceral,  partisan, "class warfare" thrill of "sticking it to the rich and business  interests." Rarely do they attempt to "work with business" to come up with  sustainable, hybrid solutions.
  
 I think if  liberals were to focus even a little more attention on the sustainability of  both the private and public sectors, everyone would be a lot better off – except  for the elitists who really are only it it for the visceral thrill of "class  warfare" and "sticking it to the rich."
  
 In short,  the optimal role of liberals in America is to provide moral support the private  sector and then to do the heavy lifting to help fill the gaps where there is a  shortfall on the part of the private sector. The private sector has a role  there, but neither has an exclusive role.
  
 For  example, the issue should not be whether government should be involved in health  care, but working with the private sector to assure that they pursue a  sustainable role in health care, and then to continue to work with the private  sector to achieve a non-partisan call for government to sustainably fill the gap  for any shortfall of coverage.
  
 The odd  thing currently is that while conservatives call for government to stay out of  the private sector, liberals do a lousy job of clearly pointing out how if the  private sector can't fill a gap in services then liberals should be reaching out  to clearly show how the private sector can support a sustainable role by  government in filling that gap. Again, the emphasis needs to be on  "sustainable."
  
 It is truly  sad that here in a capitalist economy liberals feel more at comforting fighting  "business interests" than reaching out and working with them.