Prime Minister Boris Johnson is under growing pressure from within his own party not to impose a manifesto-breaking national insurance hike to pay for social care. Former Prime Minister Sir John Major on Saturday joined the Conservatives warning against the widely-expected move targeting workers and employers by arguing it is “regressive.” Instead he called for the prime minister to take the “straightforward and honest” approach of increasing general taxation. The government is preparing to announce its long-awaited plan on how to reform and fund social care this week, and will also include measures to finance the NHS’s efforts to tackle the huge backlog caused by the coronavirus pandemic. Boris Johnson, Health Secretary Sajid Javid, and Chancellor Rishi Sunak have been thrashing out the details of the reforms. The Sunday Times reported that lifetime contributions on care will be capped at about £80,000 ($110,000), and national insurance will be increased by …