The EU infuriated Rome this week by warning over its soaring debt, rekindling a process that could eventually see Italy hit with sanctions for breaking spending promises to the EU.
“Next week I will tell Brussels 'let us do what Italians request: fewer taxes and more jobs',” Salvini said during a political rally.
“And if they say 'no', we'll see who is more stubborn,” he added.
The country's public debt stands at 132.2 percent of GDP in 2018.
This is well above the 60 percent threshold set by European rules and next week the European Commission is expected to recommend opening an “excessive deficit procedure” as punishment.
Italy's populist coalition — Salvini's far-right League and the anti-establishment Five Star Movement (M5S) — told the commission late Friday it will review both the country's tax system and public spending.
“The government is setting up a comprehensive program to review the current spending” ahead of the budget law for 2020, Finance Minister Giovanni Tria said in a reply to Brussel's request for an explanation over Italy's finances.
The government will also review Italy's revenue, including taxes, Tria said.
The opening of the EU procedure, which needs to be validated by EU finance ministers, could result in financial sanctions of up to 0.2 percent of Italian GDP, equivalent to three billion euros.