On the other hand, there is a downside. This approach relies on people´s goodwill in the sense that there is not going to be a direct supervision over employees while being at home. So, some people might/may take advantage of the situation and be doing/do something else instead of working and completing their tasks. 

In short, I consider/believe *note, consider is not used quite the same way in English and spanish that companies and employees would benefit from this approach if it were in place/allowing employees to work from home, as it would have a positive impact on cutting down on some costs concerning/including commuting issues during strikes and sick absence.

I just want to say that your English is, in general, immaculate, and I strongly feel like you are going to ACE the IELTS. Overall, there were very, very few corrections or suggestions I made that seemed to be the product of not being a native English Speaker.

Otherwise, I am the communications director for a non-profit, so I added a lot of stylistic notes or suggestions to help your writing become cleaner/more precise. LMK if you have questions, and good luck!!

=Corrections

=Suggestions - Ways to write more fluently (not grammatically wrong!)

Task 2 (IELTS test)

*I corrected this to "I," as you used "I" at the beginning, so changing to "we" impersonal feels weird here. 

**"Discuss both sides" feels more natural in the context of a debate. So I would use "discuss both sides" if I began my essay by saying "some people are strongly in favor. Others are strongly opposed." You discussed briefly that there are advantages and disadvantages, not people disagreeing. So "discuss both sides," while not grammatically wrong, isn't ideal here.

As far as the advantages are concerned, I can briefly point out a few. First of all, letting people work from home would tackle the problem of sick absence since on many occasions, people just feel unwell and all they need is to rest at home./since on many occasions, people, while too sick to drive/take public transit/commute, are not too sick to work from the comfort of their own home.  Tie this to "tackle the problem of sick absence" with something like what I added in blue. Your defense needs more support. "Note, this is not so much an "English as a Foreign Language" issue as an essay clarity issue! This would certainly have a positive impact on the labour costs/the cost of labour. In addition to that, it would help tackle another problem in big cities where sometimes the public transportpublic transit workers champions their work conditions and go on strike for a long period of time, disrupting workers' commutes until the issue is solved between the unions and the government./: the issue of commute interruptions due to transit worker strikes. Note, again this is more of an essay clarity issue than ESL issue; but make sure you connect what you write to the point. IE - transit strikes disrupt workers commutes. Therefore, just by being more flexible, firms can achieve to reduce costs that are apparently difficult to deal with what costs, specifically, are you referring to here? and improve the well-being of its their employees.