Given that the entire purpose of the Constitution is to limit the power of government, I think the answer is pretty obvious.

Did you just use these words to describe the New Left?....."Efficient government could solve social problems, grow the economy, promote equality, and advance freedoms"

You must be one of the low end voters who actually swallow the rhetoric from the Left wing media.

Lets take your description one at time....

Efficient Government that could solve social problems? Really? Are you kidding me?

Under Obama we had RECORD numbers of people living on food stamps!

Our families are broken with record numbers of children with no fathers at home.

Our nation's debt has doubed under that New Left's Obama's eight year term.

They never addrsssed our insolvent Social security system that will be bankrupt in 15 years.

Obamacare was the most inefficient plan that most people understood would fail.

The New Left is the epitomy of not being effecient.

Grow the economy? We had a record number of years GDP growth not going over 2%.

Promote equality? You mean push the LGBTYZABC agendas and force States and Pubic schools to give up their freedoms to dissagree with the big brother Collective.

Advance whose freedoms? This New Left cares about their Liberal base that funnels them money for elections. These are the only Americans the New Left cares about.

If you are a gun owner, or parent of a girl in public school who likes their daughter's privacy in bathrooms, or the State's freedom to make their own marriage laws as the people in their States decide, or the freedom of private businesses to live by their faith when it comes to controversial issues, or the freedom of life for viable babies being aborted for any reason up till birth, or the freedoms of Religious schools, hospitals, to not be forced to provide birth control, abortion, etc. for healthcare coverage, etc. etc. etc...... then you have lost your freedoms.

I disagree with the premise that the stated values of the New Left and New Right actually fit that which is outlined in the OP. IF the stated values of the OP actually reflected the given positions, the Founders would have been mostly inclined to the Right in this scenario. But again, I don't think the description is accurate.

They would have wanted as small a military as they could strategically keep as the military is the force of the government, which they wanted to keep small.

They were more concerned with equality before the law than with any other notion of equality (opportunity, or outcome). The effort of keeping equality before the law, with no one above the law, would have been their key to promoting freedom (to try, to succeed, and to fail)

They may have favored economic intervention by the government, but the world was new to capitalism, as it was to popular liberty.

They leaned way further right, as a collective whole, than the new right. They'd be pissed that we had gay and black speakers at our conventions, and beyond thepale that we gave into allowing gay marriage.