Asked about the 45p rate for £80,000 earners by Jeremy Vine on BBC Radio 2, he said: “I’m not saying how much they are going to actually have to pay straight away, we will put it up during the parliament”.
“I am very proud that we have a party that is diverse, that is inclusive, that is pluralistic and this manifesto is a product of that process”.
He added: “People like me are always optimistic… things can happen”.
Critics say the manifesto evokes the party’s 1983 offering, described then by a Labour lawmaker as “the longest suicide note in history” for helping the Conservatives win, and the ruling party questioned its funding plans.
At the end of his tweet, DeVito added the hashtag #grime4corbyn, used by some United Kingdom rappers to voice their support for the Labour campaign.
Mr McCluskey said it was hard for the party to challenge now only two years after losing an election and one year after Labour MPs attempted to replace Mr Corbyn as leader, a move he said gave the impression of a divided party in the minds of many voters.
Jeremy Corbyn’s party says that tenants now spend some £9.6 billion a year on homes that can be classed as “non-decent”.
“It will mean that Theresa May will have had an election, will have increased her majority but not dramatically”.
It has been suggested by some Corbyn allies that he should remain leader if he does better than the 30.4% of the vote Labour won at the last election under Ed Miliband.
The manifesto also confirms that were Jeremy Corbyn to prove victorious in June, Labour would legislate to ban letting agency fees charged to tenants.
Labour is defending its plans to exert state control over key utilities amid uncertainty over what the final price tag will be and how it will be paid for.
But it said it would be achieved by exchanging government bonds for shares in the relevant companies, and since profits now used to pay dividends would be used instead to pay interest on those bonds, they would be “no net cost” to the exchequer.
“Jeremy Corbyn can’t deliver any of this”, a Tory spokesman said.
Labour said it could finance its programme to increase spending on education, health and other public services through raising an additional £48 billion a year in taxes.
Labour has also said it would return the railways to public ownership as franchises expire, or in some cases using franchise reviews or break clauses.