Then assuming you agree to keep those jobs in my town for the next 10 years and considering the average salary of the employee you hire is a bit more than most in the area. There income tax combined with the increase in aggregate sales on goods and services it might be a good deal for the area. At least this is the typical rational for tax incentives. The issue with tax incentives is IMO is they create the perception of corruption (and in many cases maybe real corruption) - favoring one business over another etc...
Is there some kind of tax rule I missed where tax discounts are linked to other economic indicators? If I reduce unemployment, or reduce pollution, or plan a tree on a roundabout, or whatever, do I get some discount on my corporate tax?
and this isn't just about 1 or 2 man bands or little startups, whatever. This should apply to any company of any size. Apple, MS, Google, etc. are massive and get massive tax discounts, and I understand why, but if they get a discount on the basis of some special thing they do, this should be on the basis of a public formula that is applicable to all companies.
If you're Lithuania or whatever, you have a 0% chance of getting a company like Apple to build its European headquarters in your country if they decide on factors like accessibility, talent pool etc. So you can offer them whatever you want, and if that means they rent a mailbox in your capital and pay you 500$ of taxes per year, you're 500$ minus a mailbox ahead.
Of course London just lost 10 Billion $ in yearly tax revenue... And that's where cooperation really starts making sense: you don't make tax deals, London pays one or two of those billions to you and everyone comes out ahead (except Apple).
Technically it's a cartel, but the effects are limited because countries still have a vital interest to allow cooperations to flourish.
(Also: I know Ireland actually had a lot more to offer than a mailbox, and it's actually quite a success story)
It's equivalent to if I said I'd do the personal equivalent of corporate inversion [1] and then got a sweetheart deal from the IRS just because they'd "make more than if I left".
[1] http://www.investopedia.com/terms/c/corporateinversion.asp
Step 1: be president
Step 2: don't pay income taxes for 20 years
Step 3: it's all cool, man.