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UPDATE 5-Italy anti-system parties to boost spending, seek review of EU rules

Steve Scherer and Gavin Jones
WATCH LIVE

* Parties asking members to vote on program

* Program makes no mention of euro exit or referendum

* To see president on Monday about govt formation - Salvini

* Euro falls, Italian bond yields jump, stocks fall (Adds Di Maio, Salvini comments)

ROME, May 18 (Reuters) - Italy's two anti-establishment parties on Friday promised to ramp up spending in a program for a new coalition government, putting them on a collision course with the European Union despite watering down some of their most radical proposals.

The "contract" by the League and the 5-Star Movement, the two parties that won the most parliamentary seats in inconclusive elections on March 4, has still to be approved by their memberships in informal votes to be concluded by Sunday.

"Days and nights of work," League leader Matteo Salvini said on Twitter, where he distributed the final program. "Do you like it?"

Salvini said he and 5-Star chief Luigi Di Maio would meet President Sergio Mattarella on Monday. Mattarella must give his blessing to the program and their prime minister candidate, who has yet to be named, before a government can be formed.

The document, published after 11 weeks of political stalemate in the euro zone's third-largest economy, calls for billions of euros in tax cuts, additional spending on welfare for the poor, and a roll-back of pension reforms.

The euro sank on the latest developments on Friday and was headed for its fifth straight weekly fall against the dollar, in what would be a first for the currency since 2015.

"The possibility of a eurosceptic government in Rome is shaking investor confidence... at this point a larger fiscal deficit and greater bond issuance (in Italy) does seem likely," said David Madden, a strategist at CMC Markets.

The euro gave up gains and fell 0.2 percent to $1.1778 after the Italian parties outlined their economic plans. It settled near a five-month low reached on Wednesday of $1.1763.

The final accord dropped a proposal that would have posed the most direct challenge to EU fiscal rules, and sought to assure rattled investors that the government blueprint did not include any plans for an exit from the euro single currency.

DEBT BURDEN

An earlier draft, reviewed by Reuters, had called for the EU to create fiscal headroom for Italy by adjusting the formula used to calculate its debt burden. The final version omitted that proposal but still called for a review of EU governance and fiscal rules -- setting the stage for the bloc's biggest political challenge since Britain voted to leave two years ago.

The document is seen as the basis for governing for the entire 5-year legislative term.

Since there are few specific estimates on the costs of the measures, economists have come up with their own based on previous drafts. Carlo Cottarelli, a former senior International Monetary Fund official, estimated the annual cost of the measures at as much as 126 billion euros ($148 billion), while Corriere della Sera newspaper estimated 65 billion euros.

In a live video streamed on Facebook, Di Maio dismissed concern about the costs of the policies because, he said, they would stimulate growth which would increase state revenue.

He added: "And there is leeway in Europe that we have to reclaim to be able to spend."

Italian government bonds lost more ground on Friday, with 10-year yields set for their biggest weekly jump in almost three years. Investors are worried that a G7 nation, with a debt burden second only to Greece in the EU, is about to embark on a huge spending spree.

Italian shares also lost 1 percent.

The accord also includes a plan to securitise the debt that the government owes to companies and individuals, creating short-term bonds -- IOUs -- that can be traded.

Earlier this year, outgoing Economy Minister Pier Carlo Padoan described the proposal as "a plan to circulate a disguised parallel currency."

"Something must be done to resolve the problem of the public administration debts to taxpayers," the accord said.

Claudio Borghi, the League's economic chief who helped write the government plan, told la Verita newspaper that the new securities "could be spent anywhere, to buy anything." ($1 = 0.8491 euros)

(Additional reporting by Stephen Jewkes, Stefano Bernabei and Giuseppe Fonte Editing by Mark Bendeich and Peter Graff)