The meaning depends a bit on the political orientation of whoever is uttering the phrase. In the neoliberal nomenclature presently used throughout Europe, "structural changes" are an euphemism for cuts to public spending (healthcare, social security, pensions, services), reduction of worker rights and wage depression.

For example, France is currently undergoing "structural changes". Ireland, Spain, Greece underwent "structural changes" as a response to the global economic crisis of 2008.

In this case, I think "structural" is a euphemism for "equilibrium state," what would happen in the economy if everything stays as it is now long enough for things to settle down.

It's nonspecific even for a euphemism. "Structure" could mean "the type of products now made in the economy." It could mean "the fact that labour markets are internationalised," as the article stops short of alluding to a paragraph earlier. It could mean "the fact that we the economy is made of fewer, larger companies."