On top of the tax breaks already announced, Tuesday’s federal budget could contain measures aimed at public safety agencies, senior citizens and those caring for sick family members, CTV News has learned.

Sources say the budget will greatly increase the length of time people can collect Compassionate Care benefits. Under the program, family members who stay home from work to look after loved ones who have a significant risk of dying within six months can currently claim Employment Insurance for six weeks.

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The Canadian Cancer Society had asked the government in a pre-budget submission to extend the Compassionate Care benefit to 26 weeks, saying such a measure would help many of the more than 800,000 Canadians living with a cancer diagnosis.

CTV News has also learned Ottawa will let seniors citizens keep 30 per cent more in their Registered Retirement Income Funds (RRIFs) accounts, allowing them to potentially earn more investment income on their money, and pay less taxes.

CARP, a seniors' advocacy group, has been lobbying the government to entirely eliminate the rules that force seniors to withdraw a certain amount of funds each year from their RRIFs starting at age 71.

There will also be about $1 billion set aside for urban transit.

That would please the Federation of Canadian Municipalities, which asked in its pre-budget submission for “new federal investments of at least $1 billion annually dedicated to municipal transit projects.”

Meanwhile, more than $100 million is expected to be earmarked for hiring more CSIS spies and RCMP officers to combat homegrown terrorism. That money would be welcome news for CSIS Director Michel Coulombe and Deputy RCMP Commissioner Mike Cabana.

Coulombe told a Senate committee studying the anti-terrorism Bill C-51 this week that the number of Canadians leaving for terrorist purposes in Iraq and Syria has increased by approximately 50 per cent in the past three to four months.

Cabana told the same committee that shifting hundreds of RCMP officers to counter-terrorism had hurt the national police force's efforts to fight organized crime.

None of these new measures would likely cost as much as some of the tax measures the government has already discussed.

For example, Finance Minister Oliver recently hinted the government may double the contribution limit on Tax-Free Savings Accounts to $11,000, which would cost the federal government $860 million this year alone, according to the Parliamentary Budget Office (PBO).

The same goes for the proposed Family Tax Cut -- also known as income-splitting -- which would allow families with small children to share income for tax purposes and save up to $2,000. That move also is expected to cost more than $2.2 billion annually, according to the PBO.

Liberal finance critic Scott Brison said Monday that the predicted doubling of TFSA limits is “just another tax cut for the rich” as most families can’t make use of that extra savings room.

NDP finance critic Nathan Cullen said such measures are all about “winning back government.”

“Concerns over their own partisan interests -- winning back government -- are going to override the economic interests of the country,” Cullen said.

Meanwhile, earlier Monday, Oliver laced up a pair of New Balance-brand running shoes as part of a pre-Budget Day tradition. The purchase was a nod to the fact that Tuesday’s budget is expected to be the first balanced budget in eight years.