Where do you think that 2 trillion is coming from? Its not savings. They are literally pulling it out of thin air, think Germany 20s-early 30s style. Unlike WWII which caused a economic boom after a decade of hardship, this is doing the opposite.
I'm not saying our system is going to collapse tomorrow, or this year, simply long term if we continue down this path it ends in default, like Greece, or many of the South American countries. Events like this will just speed it up slightly.
Right now I am exceptionally concerned with the actions of our governments. They have gotten increasingly authoritarian without even having any real due diligence in suspending peoples rights and freedoms. I am not saying actions do not need to be taken, however I do not like how quickly we are willing to jump to the most draconian measures due to fear.
I also do not like how they have suspended parliament due to their fears when we need them most at this time. If the House of Commons is too small for the social distancing you can set something up in another place where there is the space, or even better using the internet or other technology we can have them work from home without the requirements to be physically in location. This is 2020, if they were able to run parliament during the Spanish Flu, they can certainly do so now with all the benefits modern technology brings us.