The constitution reflects the principle separation of powers because it

Provides a system of checks and balances between the Executive, Judicial and Legislative branches, where the powers of each branch are limited by the others.

Explanation:

The constitution frames the ideal of separation of powers as crucial for limiting any hegemonic power that might prevail. During the debates that framed the US constitution, James Madison argued that sectoral interests should be protected against the coercion of any majority, which led to the drafting of a constitution that protected individual liberties from the coercion of the majority. Thus the constitution states that the executive branch, who can appoint judges and veto laws,  should  be limited by the legislative branch, in charge of enacting laws, and the judicial branch, in charge of interpreting and applying the law.

i think it can have both positive and negative effects on businesses.

for example:

lets say you own a small business and taxes go up 4% that means it is going to cost your business more money to buy product to sell. but at the same time you make more money from the tax rise.

that is my theory.