I would vote for this constitution

I think I had seen this before from the Economist A constitution for the European Union.

In particularly:

ARTICLE 12

Taxation

The Union shall levy no taxes. (16)

ARTICLE 13

Commerce

The Union, and Member States, shall strive to remove all obstacles to the free movement of goods, and services, and capital within the Union. Save that governments may disallow the free movement of specified goods and services where there is a clear and significant risk to public health, or public order, or national security. No national law regulating the taxation of income or profit shall be construed as an obstacle to the free movement of goods, or services, or capital. (17)

The Union shall fix common rules on competition to assist the proper functioning of free markets.

The Union shall fix a common regime for trade between Member States and other countries.

Maybe we should petition this althought it likely would receive the same fate as the current garbage in France and probably Denmark. Little has changed in France since the times of my favorite frenchman Bastiat, whose commentary could be equally true of the Danish trade unions who have been out blocading Polish workers working legally in Denmark.