Re: Just change the current tax laws.
"The member states were never going to give up their tax powers to the EU, but the idea was that a single market that allowed a company in lower tax Ireland to sell in higher tax France at those lower tax rates would lead to France lowering it's tax rate and harmonising taxes across the single market."
Except that most countries are averse to raising taxes in the first place. Most of the time, the taxes are where they are because of operating expenses. What many of the proles fail to realize is that a country is like anything else: it has operating expenses, many of which can't be trimmed much without consequences. About the only ways you can seriously reduce this necessary expense is to reduce your geography or reduce your population. That's why the likes of Ireland and Luxembourg can get away with what they're doing. They're small nations with relatively few people.