The ambulance crews were demonstrating in order to demand new vehicles and protective suits. Of the 220 new ambulance ordered in 2007 not one has been assigned to Thessaloniki, Greece's second largest city and home to 10% of the population of the country.
See here for a report in Greek from Kathimerini.
On the other hand the massive medical equipment scam which has cost taxpayers billions since 2004 has gone unpunished despite a government report submitted to then minister of health, Nikos Kaklamanis in 2006 outlining the way in which companies supplying hospitals pumped up prices. For example, A titanium screw, for instance, cost 18 euros in Cyprus, but was bought for 159 euros by Greek hospitals.
Nor has present health minister, Dimitris Avramopoulos, been inclined to act on the report.