As the IMF says about FTTs:
How much overall investment would fall as a result of the STT would depend on the relative
elasticities of capital supply and demand. In a small, open economy, the after-tax return on
capital is determined on the world market. In response to imposition of the STT, capital
would flow out until its after-tax return was restored to the world market level. In the long
run, capital owners would therefore not bear the burden of the STT; it would fall on workers,
who as a result of the smaller capital stock would be less productive and receive lower
wages. If, however, the capital supply is less than perfectly elastic, the STT will lower the
return on capital, and capital owners will share the burden of the tax with workers.26
That is, the FTT is paid by the workers. And that initial part? That’s an awful lot of pensioners you’ve just made poorer too.