On the left end of the political spectrum, favor(s) government efforts to increase equality, which includes higher taxes on the wealthy and greater provision of social benefits to support those in need.

Liberals

Explanation:

The liberals is the term which refers to the political and also the moral philosophy on the basis of liberty and the equality.

 The liberals follows the given specific principle according to the government that include the individual rights, democracy, gender equality, capitalism and the secularism.

According to the given question, the left end of the liberals political system, favors the government for improving the quality and increase the various types of social benefits such as taxes.  

 Therefore, Liberals is the correct answer.

a is the final ! : )