This paper follows up recent work on the relationship between (un -- )employment and wage effects of social security financing undertaken by the OECD Jobs Study. Based on a simple macroeconometric model of the labour market, I investigate whether the peculiar OECD results for Germany on the incidence of social security contributions and taxes also hold up within a somewhat different model. The study also provides some policy simulations to answer the topical question whether increasing indirect taxes to finance a reduction of the contribution rates to social security levied on employees and employers in Germany. The main result of the paper is that there is in fact a positive short -- run employment effect of a revenue neutral switch of financing social security expenditures by increasing indirect taxes and reducing employers' contribution rates, but in the longer -- term only modest effects remain due to higher wages.