There’s a decent body of research indicating cash transfers actually are as effective as in-kind charity (often found to be even more efficient). With more recently neuance being added hinting at when one or the other is better at achieving long-term benefits. This is the basis behind charities like Give Directly. If you’re interested in some background:
Randomized trial of cash compared to food welfare in Mexico: https://www.aeaweb.org/articles?id=10.1257/app.6.2.195
OECD counties comparing cash transfers to expanded childcare and education: https://read.oecd-ilibrary.org/social-issues-migration-health/money-or-kindergarten-distributive-effects-of-cash-versus-in-kind-family-transfers-for-young-children_5k92vxbgpmnt-en#page5
India based comparison, noting the effectiveness and perception of the in-kind charity impacts long term results (e.g. social stigma of receiving food charity): https://www.sciencedirect.com/science/article/abs/pii/S0306919214000499
Any assumption that direct cash payments will be misspent as a reason to prefer in-kind welfare isn’t justified IMO. Benefits are fungible. Any money saved on food / childcare / whatever will be respent either efficiently (or not) in similar proportions to the direct money welfare… But administrative costs and externalities with in-kind transfers tend to make them less efficient on average.
A bit of an elaboration on why water towers are used in combination with pumps. Pumps are great for moving a constant amount of water around at whatever rate the pump is designed for (e.g. a small pump will move something like 1 gallon per minute). a big enough pump (or series of smaller pumps) can cause that pumped water to consistently flow at that rate.
The problem is that people don’t use water at a constant rate. In the morning, several residents probably all run the shower at the same time. if too many people open the water tap at the same time, a pump will give each just a fraction of what they expect.
But a water tank high up supplies water by gravity, you could open a large number of water taps, and as long as the pipes from the tank are big enough they’d all have the same pressure as if just one opened.
The water is gradually pumped up to the tank no matter if people are using it or not, then when many people want water, they all get it at expected pressures and the tank start to empty. Eventually people close the taps, the tank will slowly start to fill again from the pump.
This same basic design is also how water towers supply water to many single story buildings, it’s not a unique engineering feat for skyscrapers, but an adjustment to fit somewhere within the building’s footprint.