It would just be really good if companies stopped avoiding tax. Most countries are already pretty much bankrupt - it's worth thinking about for every debt (US National Debt is $35.35 trillion!!) there is a rich person on the end of it with the loan as an asset earning interest. If companies avoid tax and rich people avoid tax it means more tax for normal people who work for a living.
For example, the US federal government + state governments spend about $10 trillion a year. The US has a GDP of about $25 trillion. And the US isn't exactly known as a high tax country. France is estimated to be at 58%...