"to promote throughout the Community a harmonious, balanced and sustainable development of economic activities, a high level of employment and of social protection, equality between men and women, sustainable and non-inflationary growth, a high degree of competitiveness and convergence of economic performance, a high level of protection and improvement of the quality of the environment, the raising of the standard of living and quality of life, and economic and social cohesion and solidarity among Member States."
It's all high level goals that don't really mean that much anyway, useful mainly for lawyers to argue policy in cases before the European Court of Justice.
As to this being a socialist document, well, most EU nations are socialist, so what sort of "government" do you suppose they would create?
Many hard-core Euro-leftists actually oppose the EU as they consider it pro-business and the fiscal discipline required under the Single Currency/Monetary Union is not seen as condusive to the growth of the welfare state.