By Jessica Frank-Keyes City figures have sounded the alarm over the Prime Minister’s warning of a “painful” Budget this autumn, urging him not to “punish risk takers” and warning against “taxing wealth creators”. Sir Keir Starmer delivered his first major address from the No10 Rose Garden on Tuesday as he cautioned that the state of the public finances is “worse than we ever imagined”, ahead of what he claimed would be a “short-term pain for long-term good” fiscal statement in late October. “We have no other choice given the situation we’re in,” he warned. “Those with the broadest shoulders sh…