The phrase "boost their contributions" is correct and usable in written English.
You can use it to refer to improving the work, efforts, or donations of someone or something. For example: The nonprofit organization held a fundraising event in order to boost their contributions to educational programs in underserved communities.
Employees already in company schemes could eventually be asked, or even forced by legislation, to boost their contributions as their earnings rise.
As only 0.7% of the $22.66 B USD in 2014 of International Public Finance Funds (per Climate Adaption Panel, COP 21) to date fund climate adaptation projects; our US commitment hopefully will catalyze other countries to boost their contributions to climate adaptation funds, as well.
It follows that one might look for ways to boost their contribution to the latter objectives.
Trump reportedly told NATO allies at a July summit that the U.S. would "go it alone" unless they boosted their financial contributions.
Pensioners will be offered the opportunity to make voluntary national insurance contributions to boost their retirement income.
Many people in their 50s opt to pay "additional voluntary contributions" to boost their pensions, but this is virtually impossible if a couple have a large mortgage and are paying childcare.
In the last Autumn Statement it was proposed that, from October 2015, some pensioners and those due to reach state pension age before 6 April 2016 should have the right to pay extra national insurance contributions to boost their forthcoming single-tier state pensions from 2016.
Current pensioners will also be offered the chance to make voluntary national insurance contributions, so they can boost their incomes in retirement.
By contrast, biological altruism has nothing essentially to do with intentions or motives, and it pertains only to 'benefits' to others that increase their reproductive fitness (boosting their genetic contribution to future generations).
That may boost their productivity.
