Basically, I won't support an increase in the minimum wage until I hear the explanation of why we need a minimum wage if we have an EITC.
Some have suggested that we should not view the two policies as substitutes but as complements. Megan McArdle, guest blogging at Instapundit, hits this one head on:
Indeed, proponents of a higher minimum wage are also in favour of raising the EITC. They argue that we need both for two reasons, both of them unconvincing: first, because "a programme for the poor is a poor programme" (in other words, we need a huge middle class subsidy to give the programme a constituency), and second, because we should be targeting income in multiple ways.
The first is silly, because the EITC has proved politically more popular than the minimum wage; it has been raised in every major tax package in recent history. The second is foolish because when you talk about putting together a package of support programmes, you are generally trying to offset the strengths and weaknesses of the various individual components. But there is no weakness of the EITC that the minimum wage addresses; the EITC is superior on pretty much every count. Why on earth would you tack an economic inefficient, poorly targeted programme which may cause all sorts of adverse effects on poor workers, onto a structure that already works beautifully on its own?
A comment over at Angry Bear points to the counterargument, presented here (along with an interesting numerical example):
But it [a wage subsidy like the EITC] unquestionably does lead to downward pressure on wages as some people accept jobs at levels they would not have without those wage subsidies. And this inevitably gives those low-wage employers an advantage compared to higher-wage employers whose employess are unsubsidized by the government.
This is bad not just because it hurts those higher wage employees and employers, but is bad because it systematically encourages production systems with lower productivity and less skilled workers.
The comment cites a more extensive study of wage insurance here:
What makes the two fit together so well is that the existence of a higher minimum wage actually reduces the negative productivity, fiscal impact, and moral hazard effects of the EITC, while the EITC makes up for the weak target efficiency and income adequacy of the minimum wage.
In a nutshell, some of the benefit of the EITC may be appropriated by the employer of the low-wage worker or come at the expense of higher wage workers. Those shifts can be ameliorated by limiting the downward pressure that the EITC can put on the wages offered to the workers, for example, by establishing a higher minimum wage.
Those are reasonable arguments to make, so the decision comes down to whether the "negative productivity, fiscal impact, and moral hazard effects of the EITC" outweigh the employment effect of the minimum wage. The Eissa and Hoynes study suggests the fiscal impact and moral hazard are not problematic. I'll need to think more about the negative productivity effect. On the other side, I have been persuaded that the negative employment effects of the minimum wage are important. So while I naturally would say that if I have to accept that the minimum wage will go up, then the EITC should rise to offset some of the likely effects, I do not (yet?) sign on for the converse.
Also in the comments at Angry Bear, Bruce Webb asks:
Why should the burden of income security for workers fall entirely on the middle class and be no responsibility of the employer? Prove to me that there is no pricing power involved in setting wages and then we can talk about where the social responsibility lies.
If you thought that the labor market was characterized by monopoly power in hiring (whether from collusion among employers or just a natural monopoly, as in a company town or the like), then you could undo some of the equity effects of that monopoly power by specifying a wage floor. So this is a reasonable point as well, though focused not as much in my mind on alleviating poverty per se as in undoing another market imperfection that may already exist. I'll have to think more about whether in the markets that have come into play as of late--like big box retailers or even low-skilled jobs in the food industry--monopoly power is a large concern.