No the First Amendment covers SPECIFIC issues VERY SPECIFIC ISSUES Speech, Religion, the Press, Assembly, and Redress of Grievances
What you are talking about with Equal Treatment Under the Law falls under another part of the Constitution/Amendments (That being the 14th Amendment Section 1 "Equal Protection Under the Law" clause though its not a clear cut and dried case) which again means ITS NOT A FIRST AMENDMENT ISSUE NO MATTER HOW HARD YOU TRY TO MAKE IT ONE.
Do you or don't you have free speech issues with campaign finance laws and, more specifically, agree or disagree with the majority decision in the Citizens United case, which used the 1st amnedment (free speech) almost exclusively as the justification for finding restictions on corp. and union political expenditures unconstitutional?