Despite opposition from both the Liberal and NDP parties, the first Conservative budget in over a decade will likely pass because of the endorsement of the Bloc Quebecois.

"It's a budget of transitions. We're supporting it for one main reason: it supports fiscal imbalance," Bloc Quebecois Leader Gilles Duceppe told CTV's Robert Fife.

Prime Minister Stephen Harper has promised to increase provincial transfer payments, although the budget did not indicate any firm numbers.

Duceppe said he will wait until next year's budget to see if Harper follows through with the government's pledge.

"The real budget will be next year and Mr. Harper will have to deliver on that," he said.

Leader of the Opposition Bill Graham said he would feel "ashamed" if he did not vote against the budget.

"I don't think that the people who have voted for the Liberal Party and asked us to be the custodians of their principles and their ideals, in this House of Parliament, would want us to vote in favour of this budget," he said.

"In fact, I would be ashamed if I went back to my electorate and said, 'Yes, I could vote for it."

Graham said the budget offers little financial help for upper-income Canadians.

"In terms of taxes, there's little benefit to lower and middle-income Canadians and lots of benefits to upper-income Canadians in it," he said. "But ultimately, there's going to be tax increases in spite of what the minister is saying for those least able to afford them."

Graham also said the budget "totally eviscerates our Kyoto responsibilities."

The Conservative government has said it will drop Canada's Kyoto programs in favour of "made in Canada" solutions to lowering greenhouse gas emissions.

Meanwhile, NDP Leader Jack Layton also said he will not endorse the budget, citing a lack of real benefits for child care.

"What this budget fails to do is invest in the things that working families need for their families, like child care spaces," he said.

"There's just no long-term funding for child care spaces, so we can get places where kids can be looked after. And certainly $100 a month isn't going to do the job. Secondly, nothing for post-secondary education to keep the costs of going to school down."

Aboriginals hoping the budget would mention a $5.1 billion agreement signed last year by the Liberal government were disappointed.

Instead, the government will devote just $150 million this year for native housing, education, water and families. A further $300 million will be devoted next year.

The $5.1 billion deal was made at the first minister's meeting in November in Kelowna, B.C., shortly before the Liberal government fell.

It pledged to use $5.1 billion over five years to alleviate poverty and improve the quality of life for aboriginal Canadians, as part of a 10-year plan.

The Kelowna agreement promises to close the education gap and provide better water on reserves. It also aims to improve housing policies by encouraging private ownership of homes.