The currency in "Frost Age 2" is a very important general equivalent in the game. After the society enters a more advanced level, the role of currency will become great. However, the currency that can be obtained through taxation in the early stage is very small. If you want to get a lot of currency quickly, you can use a fundraising action in a community.
How to get money quickly in Ice Age 2
One of the biggest limitations in your development will be the scarcity of official currency in London. You'll receive tax revenue every week, but usually no more than a few dozen coins - less if you can't keep up with citizens' demand for goods. And construction costs can run into hundreds of currencies.
If you need to solve a problem quickly and can't wait for regular city revenue to come in, your best bet is to use a fundraising operation in a community. This will make their opinion of you slightly less favorable, so you should choose a community that supports you.
It is not a good idea to try to blackmail a population that is already on the verge of rioting. You'll get a certain number of Hot Tickets based on the number of citizens in your chosen community, so a large community will contribute a few hundred Hot Tickets, enough to support a major building program!
If you need to engage the community before asking them for funding, use a grant agenda first. They'll choose the next issue to vote on in committee, but don't worry - if you don't like what they choose, you can negotiate with other representatives to ensure a failed vote.