When we do favors for others, we never lose – even when it looks like a waste of time. The Chazon Ish zt”l once counseled a young kollel man who was worried that doing chesed would waste time from Torah study: “To fully understand Torah, we must be refined and refinement is attained only via performing acts of kindness. There is no spiritual forfeiture when we aid others – to the contrary, it itself is the very goal – it is an attainment of perfection!
There is a popular adage: “Another’s materialism is our spirituality…”  ~ Rav Menachem Azolai as translated by Dov Elias