If they keep this up the Euro periphery will collapse.
Not really - most of the Euro periphery is not in the competitive position to benefit, should German consumer demand grow.
Could you point me towards some information in this regard? 12.19% of Italy's imports are to Germany, as are 11% of Spain's imports, 11% of Portugal's imports, and 9.6% of Greece's. Not to mention the second order effects. Also 10.27% of Turkey's imports, 31% of the Czech Republic's, 23% of Hungary's, and 24% of Poland's (not Euro but if they competitively devalue it will harm the former).
Its a legitimate question, which I took as opportunity to cross-check older assessment with actual data. I started with Italy. Overall, Italian exports to Germany have from 2010 to 2013 increased by 13%, so its not like German austerity killing the Italian economy. Rather, Germany's economic strength is pulling Italy.
I have put commodity groups (2-digit classification) together into major groups. The allocation may in certain cases be a bit questionable, but the overall picture should be reasonably adequate.
In 2013, the top Italian exports to Germany were (share, change against 2010):
1. Machinery, equipment, electronics, tools: 24.2 %, + 12%
2. Iron, steel, other metals, and products thereof: 14.9 %, + 17%
3. Food, beverages, tobacco 12.5 %, + 18%
4. Vehicles (mostly cars/ car parts): 12.1 %, + 11%
5. Chemical & pharmaceutical products: 10.3 %, + 21%
6. Rubber & plastics products (including tyres): 7.8 %, + 22%
7. Leather, shoes, clothing 5.5 %, + 11%
8. Furniture, toys, other finished products 4.4 %, - 5 %
9. Glass & ceramics 1.9 %, - 5 %
The remainder (6.5%) falls on various un- and semi-processed products including fuels, textile fibres, wood, paper, etc.
If you look at that mix, 55% of the export is investment goods or manufacturing input. This export may to some extent ultimately be influenced by Germany's domestic demand, but more important is Germany's global competitiveness.
Some 20% of exports are vehicles, car parts, tyres etc. Some of that may be re-exported out of Germany, some may be geared towards business (delivery vans), some, as durables, be sensitive to German domestic demand. Pretty difficult to break down. However, in any case, competitiveness (technologically, quality- and price-wise) will be much more relevant to the fate of these Italian exports than German consumer spending.
That leaves us with about 25% consumer products. When it comes to food & beverages, Italy is (surprise, surprise) doing quite well, and might take its share of higher consumer spending. The same applies in principle to clothing, shoes and leather articles, though I wonder whether we are really talking about the price segments here that would benefit from, say, an increase in Hartz IV basic income. Finally, you have interior decoration (furniture, glass ceramics), where Italy is losing market share. Here, obviously, the issue is less about German demand and more about competition from Eastern Europe and Asia.