What goes up but never goes down? For Ireland’s army of business owners and entrepreneurs, the answer is simple: Capital gains tax (CGT). Before the last crisis, the rate was 20 per cent. In October 2008, as the government grappled with the banking crisis, it was increased to 22 per cent. The following year, as the crisis deepened and with the government attempting to raise funds from all possible avenues, it was pushed up again to 25 per cent. In 2011, it increased to 30 per cent. And the following year, it was again increased to 33 per cent. And…