JG would ruin typical cycles of employment– loss of job performance, cheap labor, and higher taxes

In reality, the fiscal costs are likely to be much, much higher, and the economic welfare losses even more significant, because in the labor market and broader economy, a public jobs guarantee program would significantly crowd out productive private sector activity. This type of policy will radically alter behavior of both workers and businesses, and so the supply and demand for labor.

The Census shows that, among those who worked in 2016, 70+ million Americans earned under $32,500 (the full‐​time job guarantee salary would be $31,200). Yes, not all of these would seek out positions on the jobs guarantee program. But a large proportion would, especially those employed in uncertain roles with low levels of job security.

In fact, some even paid more than $31,200 might consider leaving their jobs to pursue guaranteed roles if they perceive better working conditions or an easier worklife (asked under what conditions someone would be fired from such a role, the Levy Institute paper suggests that you would be sacked for failing to go to work, but that your performance would not be judged by “private sector ‘efficiency criteria’”, for example.) It’s not inconceivable then that over 25 percent of the labor force could find itself part of the scheme.

This crowd‐​out is likely to be particularly acute in low productivity regions, and (ironically) after economic downturns. A nationwide jobs guarantee program paying $15 an hour will be particularly attractive to workers in low wage regions, and by setting a de facto wage floor the program will prevent private investment in regions on the basis of cheap labor.

Though no doubt there would be some demand spillovers from well‐​paid jobs, the net consequence is highly likely to be weaker private sector job creation in poor regions, which has been the experience of countries such as Britain with a nationwide minimum wages and public sector national pay bargaining. Proponents of the scheme see “higher labor standards” as a good thing, but absent productivity improvements, policies which raise labor costs significantly will reduce the quantity of workers demanded.

There’s good reason to expect the policy will reduce the efficiency and productive potential of the economy too. Taxes will eventually need to be raised to cover the net cost of the program. In infrastructure and care giving provision, costs will rise – because nobody would now work in these directly substitutable sectors for less than the wage and conditions offered in the job guarantee program. This will waste resources, and there’s highly likely to be overinvestment in lots of relatively low value ventures and programs to ensure workers are employed, especially given the explicit aim is to provide employment rather than deliver projects at low cost.

Throwing resources at regions with higher levels of unemployment and after recessions too will work directly against market signals and deter the mobility of labor (in geographic and industrial terms) and capital to its most productive uses given prevailing market conditions. This is important: yes, employment is highly likely to have some positive externalities; but the real driver of better living standards over time are productivity improvements, discovered by market‐​based activity.

Proponents of this policy seem to put an enormous weight on the idea that time out of the labor market has huge scarring consequences which could be ameliorated by any type of temporary employment. But the literature on this shows that temporary jobs do not provide the workers with skills to improve longer‐​term labor market outcomes.