Lord Jim O’Neill, the former Goldman Sachs economist and ex-Treasury minister, has publicly expressed reservations about proposed tax increases, particularly a rise in capital gains tax (CGT), cautioning that such measures could hinder economic growth and ultimately reduce government revenue. His comments come amid discussions within the government on how to balance the budget in a challenging economic context.

Since Andy Burnham became prime minister, efforts have been made to engage Lord O’Neill in an official advisory capacity, but he declined roles offered to him, including becoming a minister in the House of Lords or serving as a special adviser. His reluctance was partly driven by a desire to maintain independence and avoid conflicts of interest tied to the financial disclosures and blind trust requirements that such positions entail. Instead, Lord O’Neill prefers an informal advisory arrangement, enabling him to speak freely and publicly on economic matters.

In a recent interview, Lord O’Neill warned Chancellor John Healey against increasing capital gains tax, describing such a move as "stupid" given the current economic headwinds. He noted that businesses are still grappling with the consequences of Brexit, changes to national insurance, and labor market reforms including zero-hours contracts. Adding inheritance tax increases to the mix, he argued, would compound the challenges faced by entrepreneurs and wealth creators, potentially stifling investment and growth.

Lord O’Neill emphasized a technical concern about CGT: that inflation creates artificial gains which, if taxed without adjustment, punish investors unfairly. He also suggested that raising CGT rates could lead business owners to delay selling assets or move capital abroad to avoid higher taxes, which would undermine the expected boost in government revenues. His views are shaped by nearly two decades of experience as a venture capital investor, making him acutely aware of the risks entrepreneurs face.

While praising Prime Minister Burnham for fostering a more positive and optimistic national mood, Lord O’Neill cautioned that the government must avoid dampening this spirit with additional tax burdens. He urged policymakers to consider alternative sources for fiscal consolidation, such as ending the triple-lock on state pension increases or achieving savings in the welfare budget.

Nevertheless, Lord O’Neill acknowledged the difficult decisions ahead as Parliament resumes following the summer recess. He suggested that while economic growth remains fragile, sound policy choices are essential to support wealth creation and maintain confidence in the business environment.

The dialogue between Lord O’Neill and government officials illustrates ongoing tensions in balancing fiscal responsibility with the imperative to encourage economic expansion amid challenging domestic and international conditions.