There's some errors in the logic, don't believe this.
There is a lot of talk nowadays in Belgium on either taxing robots or lowering the minimum wages. Remarkably, typically right-wing parties oppose the first and opt for the second, while typically left-wing parties propose the first and object to the latter. Personaly, and consistently, I am not in favour of any of the two measures, because indeed... they are the same.
Basically, by taxing robots, capital is made more expensive, which causes a shift to labour as an input factor. Similarly, the relative price of labour may go down by lowering the minimum wage, causing the exact same shift between the two input factors, all else being equal.
As I explained in another post in Dutch, one may argue whether to tax capital in general (profits, wealth, etc.) or wages. There could be an equivalence between all tax options. The main worry is that taxes cannot be avoided, which is why it is generally preferable to tax in tiny bits everywhere (capital, consumption, income, transfers, real estate, inheritance, etc.) - this is my theory of chaos economics. However, for now it is clear that labour is easily traceable, and hence an easy target for taxes. The only condition is that wages are sufficiently high, so what matters is not the tax rate - which you should calculate over all sources - but the wage share, which should be around 75% for a steadily growing economy, if the second half of the 20th century is to be taken as an example.
So please, do not tax robots - increase wages!