Here's an article (in Spanish) that caught my eye this morning. A couple of interesting tidbits:
"The Spanish cleaning companies Association and the Unions trust that the new Public Contracts Law covers labour costs and to guarantee the social rights of workers in all tenders from the various contracting authorities."
Here's what is meant by it, in the words of the Association president:
"...to include in the award criteria various elements related to the service quality, such as the working conditions offered by the companies..."
I find this article interesting for a couple of reasons. First, it is very uncommon to see both business and unions agreeing on labour costs. Second, it is possible to explain it by looking at the incentives and how they are both aligned in this instance. Let's start with the companies.
Cleaning services are incredible price sensitive and (as it is claimed) 90% of the cost incurred with each contract is simply labour costs. Companies hate competition and honestly price is the most liquid of comparators wether we like it or not. Since those contracts tend to be awarded based on price, if the costs is essentially fixed (the minimum wage) then they are effectively competing in the narrow sliver of their margin (those 10%) and that is where it hurts. No wonder they want to either take price out of the equation or dilute with "service quality" criteria. More about this in a second.
As for the unions, they simply want a better deal for their members and there is nothing wrong with that, so they also want prices to rise assuming they translate into higher wages (they won't) or at least better working conditions for cleaning staff.
So, both parties interests are aligned in reducing price importance in the equation. In other words, both want the contracts to get more expensive. One side wants better margins, the other either more pay or better working conditions.
About the "service quality" then. The second citation above is a direct citation. The example of service quality provided by the President of the cleaning companies association has nothing to do with service quality (well, at least not directly) but with working conditions instead. To conflate the two is disingenuous to say the least. Working conditions are a problem for companies like cleaning services companies due to attrition and costs of training/recruiting new staff.
It is not surprising for me that he did not pick up other award criteria for quality. No mention of efficiency (although price is a proxy for it), availability/turn around of staff in case of spike in cleaning needs, technology to manage the contract/communications, etc. It may well be, however, that he did mention them but the reporter chose that tidbit instead.
In any case this is a roundabout way of solving the fundamental problem: wages are probably too low. It will lead to worse outcomes than solving the fundamental problem. And even then, let's be honest and assume that solving that problem implies higher taxes. There are no free lunches in public procurement.